diff --git a/sendpulse/automation360_service.go b/sendpulse/automation360_service.go
index a244c99..bca9ece 100644
--- a/sendpulse/automation360_service.go
+++ b/sendpulse/automation360_service.go
@@ -29,7 +29,7 @@ type Autoresponder struct {
 		MainID   int                    `json:"main_id"`
 		AfType   string                 `json:"af_type"`
 		Created  DateTimeType           `json:"created"`
-		LastSend DateTimeType           `json:"created"`
+		LastSend DateTimeType           `json:"last_send"`
 		Task     map[string]interface{} `json:"task"`
 	} `json:"flows"`
 	Starts       int `json:"starts"`
@@ -44,7 +44,7 @@ func (service *Automation360Service) GetAutoresponderStatistics(id int) (*Autore
 	path := fmt.Sprintf("/a360/autoresponders/%d", id)
 
 	var respData *Autoresponder
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -55,7 +55,7 @@ func (service *Automation360Service) StartEvent(eventName string, variables map[
 	var respData struct {
 		Result bool `json:"result"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), variables, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, variables, &respData, true)
 	return err
 }
 
@@ -73,7 +73,7 @@ func (service *Automation360Service) GetStartBlockStatistics(id int) (*MainTrigg
 	var respData struct {
 		Data *MainTriggerBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -105,7 +105,7 @@ func (service *Automation360Service) GetEmailBlockStatistics(id int) (*EmailBloc
 	var respData struct {
 		Data *EmailBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -126,7 +126,7 @@ func (service *Automation360Service) GetPushBlockStatistics(id int) (*PushBlockS
 	var respData struct {
 		Data *PushBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -149,7 +149,7 @@ func (service *Automation360Service) GetSmsBlockStatistics(id int) (*SmsBlockSta
 	var respData struct {
 		Data *SmsBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -168,7 +168,7 @@ func (service *Automation360Service) GetMessengerBlockStatistics(id int) (*Messe
 	var respData struct {
 		Data *MessengerBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -186,7 +186,7 @@ func (service *Automation360Service) GetFilterBlockStatistics(id int) (*FilterBl
 	var respData struct {
 		Data *FilterBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -204,7 +204,7 @@ func (service *Automation360Service) GetTriggerBlockStatistics(id int) (*Trigger
 	var respData struct {
 		Data *TriggerBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -227,7 +227,7 @@ func (service *Automation360Service) GetGoalBlockStatistics(id int) (*GoalBlockS
 	var respData struct {
 		Data *GoalBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -245,7 +245,7 @@ func (service *Automation360Service) GetActionBlockStatistics(id int) (*ActionBl
 	var respData struct {
 		Data *ActionBlockStat `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -279,7 +279,7 @@ func (service *Automation360Service) GetAutoresponderConversions(id int) (*Autor
 	var respData struct {
 		Data *AutoresponderConversion `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -301,6 +301,6 @@ func (service *Automation360Service) GetAutoresponderContacts(id int) ([]*Autore
 	var respData struct {
 		Items []*AutoresponderContact `json:"items"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Items, err
 }
diff --git a/sendpulse/balance_service.go b/sendpulse/balance_service.go
index 727b7fb..709440f 100644
--- a/sendpulse/balance_service.go
+++ b/sendpulse/balance_service.go
@@ -1,7 +1,6 @@
 package sendpulse
 
 import (
-	"fmt"
 	"net/http"
 	"strings"
 )
@@ -56,7 +55,7 @@ func (service *BalanceService) GetBalance(currency string) (*Balance, error) {
 	}
 
 	var respData Balance
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return &respData, err
 }
 
@@ -65,6 +64,6 @@ func (service *BalanceService) GetDetailedBalance() (*BalanceDetailed, error) {
 	path := "/user/balance/detail"
 
 	var respData BalanceDetailed
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return &respData, err
 }
diff --git a/sendpulse/emails_address_service.go b/sendpulse/emails_address_service.go
index d1e8a18..d0d2ff1 100644
--- a/sendpulse/emails_address_service.go
+++ b/sendpulse/emails_address_service.go
@@ -33,7 +33,7 @@ type EmailInfo struct {
 func (service *AddressService) GetEmailInfo(email string) ([]*EmailInfo, error) {
 	path := fmt.Sprintf("/emails/%s", email)
 	var response []*EmailInfo
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response, err
 }
 
@@ -46,7 +46,7 @@ func (service *AddressService) GetEmailsInfo(emails []string) (map[string][]*Ema
 
 	params := data{Emails: emails}
 	respData := make(map[string][]*EmailInfo)
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &respData, true)
 	return respData, err
 }
 
@@ -62,7 +62,7 @@ type EmailInfoList struct {
 func (service *AddressService) GetDetails(email string) ([]*EmailInfoList, error) {
 	path := fmt.Sprintf("/emails/%s/details", email)
 	var response []*EmailInfoList
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response, err
 }
 
@@ -70,7 +70,7 @@ func (service *AddressService) GetDetails(email string) ([]*EmailInfoList, error
 func (service *AddressService) GetStatisticsByCampaign(campaignID int, email string) (*CampaignEmailStatistics, error) {
 	path := fmt.Sprintf("/campaigns/%d/email/%s", campaignID, email)
 	var respData *CampaignEmailStatistics
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -96,7 +96,7 @@ type CampaignEmailStatistics struct {
 func (service *AddressService) GetStatisticsByAddressBook(addressBookID int, email string) (*AddressBookEmailStatistics, error) {
 	path := fmt.Sprintf("/addressbooks/%d/emails/%s", addressBookID, email)
 	var respData AddressBookEmailStatistics
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return &respData, err
 }
 
@@ -106,7 +106,7 @@ func (service *AddressService) DeleteFromAllAddressBooks(email string) error {
 	var respData struct {
 		Result bool
 	}
-	_, err := service.client.newRequest(http.MethodDelete, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodDelete, path, nil, &respData, true)
 	return err
 }
 
@@ -128,7 +128,7 @@ type CampaignsEmailStatistics struct {
 func (service *AddressService) GetEmailStatisticsByCampaignsAndAddressBooks(email string) (*CampaignsEmailStatistics, error) {
 	path := fmt.Sprintf("/emails/%s/campaigns", email)
 	var respData *CampaignsEmailStatistics
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -154,7 +154,7 @@ func (service *AddressService) GetEmailsStatisticsByCampaignsAndAddressBooks(ema
 	}
 
 	params := data{Emails: emails}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &respData, true)
 	return respData, err
 }
 
@@ -171,6 +171,6 @@ func (service *AddressService) ChangeVariables(addressBookID int, email string,
 	var respData struct {
 		Result bool `json:"result"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &respData, true)
 	return err
 }
diff --git a/sendpulse/emails_addressbooks_service.go b/sendpulse/emails_addressbooks_service.go
index 077bd94..fe129c5 100644
--- a/sendpulse/emails_addressbooks_service.go
+++ b/sendpulse/emails_addressbooks_service.go
@@ -27,7 +27,7 @@ func (service *MailingListsService) CreateMailingList(name string) (int, error)
 		ID int `json:"id"`
 	}
 	params := data{Name: name}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &response, true)
 	return response.ID, err
 }
 
diff --git a/sendpulse/emails_blacklist_service.go b/sendpulse/emails_blacklist_service.go
index 3e60005..bcccea8 100644
--- a/sendpulse/emails_blacklist_service.go
+++ b/sendpulse/emails_blacklist_service.go
@@ -2,7 +2,6 @@ package sendpulse
 
 import (
 	b64 "encoding/base64"
-	"fmt"
 	"net/http"
 	"strings"
 )
@@ -39,7 +38,7 @@ func (service *BlacklistService) AddToBlacklist(emails []string, comment string)
 	}
 
 	var respData response
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &respData, true)
 	return err
 }
 
@@ -60,7 +59,7 @@ func (service *BlacklistService) RemoveFromBlacklist(emails []string) error {
 	}
 
 	var respData response
-	_, err := service.client.newRequest(http.MethodDelete, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodDelete, path, params, &respData, true)
 	return err
 }
 
@@ -69,6 +68,6 @@ func (service *BlacklistService) GetEmails() ([]string, error) {
 	path := "/blacklist"
 
 	var respData []string
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
diff --git a/sendpulse/emails_mailings_service.go b/sendpulse/emails_mailings_service.go
index 58deb3e..b68a53e 100644
--- a/sendpulse/emails_mailings_service.go
+++ b/sendpulse/emails_mailings_service.go
@@ -71,7 +71,7 @@ func (service *CampaignsService) CreateCampaign(data CampaignParams) (*Campaign,
 		data.BodyAMP = b64.StdEncoding.EncodeToString([]byte(data.BodyAMP))
 	}
 
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), data, &innerMailing, true)
+	_, err := service.client.newRequest(http.MethodPost, path, data, &innerMailing, true)
 	if err != nil {
 		return nil, err
 	}
@@ -99,7 +99,7 @@ func (service *CampaignsService) UpdateCampaign(id int, data CampaignParams) err
 		data.BodyAMP = b64.StdEncoding.EncodeToString([]byte(data.BodyAMP))
 	}
 
-	_, err := service.client.newRequest(http.MethodPatch, fmt.Sprintf(path), data, &respData, true)
+	_, err := service.client.newRequest(http.MethodPatch, path, data, &respData, true)
 	return err
 }
 
@@ -107,7 +107,7 @@ func (service *CampaignsService) UpdateCampaign(id int, data CampaignParams) err
 func (service *CampaignsService) GetCampaign(id int) (*Campaign, error) {
 	path := fmt.Sprintf("/campaigns/%d", id)
 	var respData Campaign
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return &respData, err
 }
 
diff --git a/sendpulse/emails_senders_service.go b/sendpulse/emails_senders_service.go
index 74adb5c..cd2e67f 100644
--- a/sendpulse/emails_senders_service.go
+++ b/sendpulse/emails_senders_service.go
@@ -30,7 +30,7 @@ func (service *SendersService) CreateSender(name string, email string) error {
 		Result bool `json:"result"`
 	}
 
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &response, true)
 	return err
 }
 
@@ -40,7 +40,7 @@ func (service *SendersService) GetSenderActivationCode(email string) error {
 	var response struct {
 		Result bool `json:"result"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return err
 }
 
@@ -58,7 +58,7 @@ func (service *SendersService) ActivateSender(email, code string) error {
 	var response struct {
 		Result bool `json:"result"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &response, true)
 	return err
 }
 
@@ -72,7 +72,7 @@ func (service *SendersService) GetSenders() ([]*Sender, error) {
 	path := "/senders"
 
 	var respData []*Sender
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -90,6 +90,6 @@ func (service *SendersService) DeleteSender(email string) error {
 	var response struct {
 		Result bool `json:"result"`
 	}
-	_, err := service.client.newRequest(http.MethodDelete, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodDelete, path, params, &response, true)
 	return err
 }
diff --git a/sendpulse/emails_templates_service.go b/sendpulse/emails_templates_service.go
index c321c4a..87bdfef 100644
--- a/sendpulse/emails_templates_service.go
+++ b/sendpulse/emails_templates_service.go
@@ -38,7 +38,7 @@ func (service *TemplatesService) CreateTemplate(name string, body string, lang s
 		Result bool `json:"result"`
 		RealID int  `json:"real_id"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &response, true)
 	return response.RealID, err
 }
 
@@ -58,7 +58,7 @@ func (service *TemplatesService) UpdateTemplate(templateID int, body string, lan
 	var response struct {
 		Result bool `json:"result"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &response, true)
 	return err
 }
 
@@ -105,7 +105,7 @@ func (t *Template) UnmarshalJSON(data []byte) error {
 func (service *TemplatesService) GetTemplate(templateID int) (*Template, error) {
 	path := fmt.Sprintf("/template/%d", templateID)
 	var respData Template
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return &respData, err
 }
 
@@ -116,6 +116,6 @@ func (service *TemplatesService) GetTemplates(limit, offset int, owner string) (
 	}
 
 	var respData []*Template
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
diff --git a/sendpulse/emails_validator_service.go b/sendpulse/emails_validator_service.go
index 9bc1d99..0fc8d85 100644
--- a/sendpulse/emails_validator_service.go
+++ b/sendpulse/emails_validator_service.go
@@ -27,7 +27,7 @@ func (service *ValidatorService) ValidateMailingList(mailingListID int) error {
 		ID int `json:"id"`
 	}
 	body := bodyFormat{ID: mailingListID}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), body, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, body, &response, true)
 	return err
 }
 
@@ -44,7 +44,7 @@ func (service *ValidatorService) GetMailingListValidationProgress(mailingListID
 		Result bool                `json:"result"`
 		Data   *ValidationProgress `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response.Data, err
 }
 
@@ -83,7 +83,7 @@ type MailingListValidationResultDetailed struct {
 func (service *ValidatorService) GetMailingListValidationResult(mailingListID int) (*MailingListValidationResultDetailed, error) {
 	path := fmt.Sprintf("/verifier-service/check/?id=%d", mailingListID)
 	var response *MailingListValidationResultDetailed
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response, err
 }
 
@@ -94,7 +94,7 @@ func (service *ValidatorService) GetValidatedMailingLists(limit, offset int) ([]
 		Total int                            `json:"total"`
 		List  []*MailingListValidationResult `json:"list"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response.List, err
 }
 
@@ -108,7 +108,7 @@ func (service *ValidatorService) ValidateEmail(email string) error {
 		Email string `json:"email"`
 	}
 	body := bodyFormat{Email: email}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), body, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, body, &response, true)
 	return err
 }
 
@@ -132,7 +132,7 @@ func (service *ValidatorService) GetEmailValidationResult(email string) (*EmailV
 		Result bool                   `json:"result"`
 		Data   *EmailValidationResult `json:"data"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response.Data, err
 }
 
@@ -146,7 +146,7 @@ func (service *ValidatorService) DeleteEmailValidationResult(email string) error
 		Email string `json:"email"`
 	}
 	body := bodyFormat{Email: email}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), body, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, body, &response, true)
 	return err
 }
 
@@ -186,7 +186,7 @@ func (service *ValidatorService) CreateMailingListValidationReport(params Mailin
 		body.Statuses = "[" + strings.Join(strStatuses, ",") + "]"
 	}
 
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &response, true)
 	return err
 }
 
@@ -194,6 +194,6 @@ func (service *ValidatorService) CreateMailingListValidationReport(params Mailin
 func (service *ValidatorService) GetMailingListValidationReport(mailingListID int) (*MailingListValidationResultDetailed, error) {
 	path := fmt.Sprintf("/verifier-service/check-report?id=%d", mailingListID)
 	var response *MailingListValidationResultDetailed
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &response, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &response, true)
 	return response, err
 }
diff --git a/sendpulse/emails_webhooks_service.go b/sendpulse/emails_webhooks_service.go
index 2c83124..fd3365e 100644
--- a/sendpulse/emails_webhooks_service.go
+++ b/sendpulse/emails_webhooks_service.go
@@ -32,7 +32,7 @@ func (service *WebhooksService) GetWebhooks() ([]*Webhook, error) {
 		Data    []*Webhook `json:"data"`
 	}
 
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
@@ -45,7 +45,7 @@ func (service *WebhooksService) GetWebhook(id int) (*Webhook, error) {
 		Data    *Webhook `json:"data"`
 	}
 
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Data, err
 }
 
diff --git a/sendpulse/push_service.go b/sendpulse/push_service.go
index 42c77f0..71fcb10 100644
--- a/sendpulse/push_service.go
+++ b/sendpulse/push_service.go
@@ -70,7 +70,7 @@ func (service *PushService) CountWebsites() (int, error) {
 	var respData struct {
 		Total int `json:"total"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Total, err
 }
 
@@ -85,7 +85,7 @@ type PushWebsite struct {
 func (service *PushService) GetWebsites(limit, offset int) ([]*PushWebsite, error) {
 	path := fmt.Sprintf("/push/websites/?limit=%d&offset=%d", limit, offset)
 	var respData []*PushWebsite
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -100,7 +100,7 @@ type PushWebsiteVariable struct {
 func (service *PushService) GetWebsiteVariables(websiteID int) ([]*PushWebsiteVariable, error) {
 	path := fmt.Sprintf("/push/websites/%d/variables", websiteID)
 	var respData []*PushWebsiteVariable
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -146,7 +146,7 @@ func (service *PushService) GetWebsiteSubscriptions(websiteID int, params Websit
 	}
 
 	var respData []*WebsiteSubscription
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -156,7 +156,7 @@ func (service *PushService) CountWebsiteSubscriptions(websiteID int) (int, error
 	var respData struct {
 		Total int `json:"total"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Total, err
 }
 
@@ -177,7 +177,7 @@ type WebsiteInfo struct {
 func (service *PushService) GetWebsiteInfo(websiteID int) (*WebsiteInfo, error) {
 	path := fmt.Sprintf("/push/websites/info/%d", websiteID)
 	var respData *WebsiteInfo
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -194,7 +194,7 @@ func (service *PushService) ActivateSubscription(subscriptionID int) error {
 	var respData struct {
 		Result bool `json:"true"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), data, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, data, &respData, true)
 	return err
 }
 
@@ -211,7 +211,7 @@ func (service *PushService) DeactivateSubscription(subscriptionID int) error {
 	var respData struct {
 		Result bool `json:"true"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), data, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, data, &respData, true)
 	return err
 }
 
@@ -260,7 +260,7 @@ func (service *PushService) CreatePushCampaign(params PushMessageParams) (int, e
 		ID     int  `json:"id"`
 		Result bool `json:"true"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &respData, true)
 	return respData.ID, err
 }
 
@@ -285,6 +285,6 @@ func (service *PushService) GetPushMessagesStatistics(taskID int) (*PushMessages
 	path := fmt.Sprintf("/push/tasks/%d", taskID)
 
 	var respData *PushMessagesStatistics
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
diff --git a/sendpulse/smtp_service.go b/sendpulse/smtp_service.go
index c6e39f9..bf191b7 100644
--- a/sendpulse/smtp_service.go
+++ b/sendpulse/smtp_service.go
@@ -54,7 +54,7 @@ func (service *SmtpService) SendMessage(params SendEmailParams) (string, error)
 		Result bool   `json:"result"`
 		ID     string `json:"id"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), data, &response, true)
+	_, err := service.client.newRequest(http.MethodPost, path, data, &response, true)
 	return response.ID, err
 }
 
@@ -70,7 +70,7 @@ type SmtpMessage struct {
 	UsedIP                string       `json:"used_ip"`
 	Recipient             string       `json:"recipient"`
 	Subject               string       `json:"subject"`
-	SendDate              DateTimeType `json:"subject"`
+	SendDate              DateTimeType `json:"send_date"`
 	Tracking              struct {
 		Click int `json:"click"`
 		Open  int `json:"open"`
@@ -125,7 +125,7 @@ func (service *SmtpService) GetMessages(params SmtpListParams) ([]*SmtpMessage,
 	}
 
 	var respData []*SmtpMessage
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -134,14 +134,14 @@ func (service *SmtpService) CountMessages() (int, error) {
 	var respData struct {
 		Total int `json:"total"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Total, err
 }
 
 func (service *SmtpService) GetMessage(id int) (*SmtpMessage, error) {
 	path := fmt.Sprintf("/smtp/emails/%d", id)
 	var respData *SmtpMessage
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -167,7 +167,7 @@ func (service *SmtpService) GetDailyBounces(limit, offset int, date time.Time) (
 	}
 
 	var respData *BouncesList
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -177,7 +177,7 @@ func (service *SmtpService) CountBounces() (int, error) {
 	var respData struct {
 		Total int `json:"total"`
 	}
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData.Total, err
 }
 
@@ -198,7 +198,7 @@ func (service *SmtpService) UnsubscribeEmails(emails []*SmtpUnsubscribeEmail) er
 	var respData struct {
 		Result bool `json:"true"`
 	}
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), data, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, data, &respData, true)
 	return err
 }
 
@@ -214,7 +214,7 @@ func (service *SmtpService) DeleteUnsubscribedEmails(emails []string) error {
 	var respData struct {
 		Result bool `json:"true"`
 	}
-	_, err := service.client.newRequest(http.MethodDelete, fmt.Sprintf(path), data, &respData, true)
+	_, err := service.client.newRequest(http.MethodDelete, path, data, &respData, true)
 	return err
 }
 
@@ -244,7 +244,7 @@ func (service *SmtpService) GetUnsubscribedEmails(params UnsubscribedListParams)
 
 	var respData []Unsubscribed
 
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -252,7 +252,7 @@ func (service *SmtpService) GetSendersIPs() ([]string, error) {
 	path := "/smtp/ips"
 
 	var respData []string
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -260,7 +260,7 @@ func (service *SmtpService) GetSendersEmails() ([]string, error) {
 	path := "/smtp/senders"
 
 	var respData []string
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -268,7 +268,7 @@ func (service *SmtpService) GetAllowedDomains() ([]string, error) {
 	path := "/smtp/domains"
 
 	var respData []string
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return respData, err
 }
 
@@ -284,7 +284,7 @@ func (service *SmtpService) AddDomain(email string) error {
 	}
 	params := data{Email: email}
 
-	_, err := service.client.newRequest(http.MethodPost, fmt.Sprintf(path), params, &respData, true)
+	_, err := service.client.newRequest(http.MethodPost, path, params, &respData, true)
 	return err
 }
 
@@ -295,6 +295,6 @@ func (service *SmtpService) VerifyDomain(email string) error {
 		Result bool `json:"result"`
 	}
 
-	_, err := service.client.newRequest(http.MethodGet, fmt.Sprintf(path), nil, &respData, true)
+	_, err := service.client.newRequest(http.MethodGet, path, nil, &respData, true)
 	return err
 }
diff --git a/sendpulse/vk_ok_service_test.go b/sendpulse/vk_ok_service_test.go
index 8726553..0a5615e 100644
--- a/sendpulse/vk_ok_service_test.go
+++ b/sendpulse/vk_ok_service_test.go
@@ -25,13 +25,19 @@ func (suite *SendpulseTestSuite) TestVkOkService_CreateSender() {
 
 	b64 := "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"
 	dec, err := base64.StdEncoding.DecodeString(b64)
+	if err != nil {
+		panic(err)
+	}
 
 	f, err := os.Create("/tmp/img.jpg")
 	if err != nil {
 		panic(err)
 	}
 	defer f.Close()
-	f.Write(dec)
+	_, err = f.Write(dec)
+	if err != nil {
+		panic(err)
+	}
 
 	id, err := suite.client.VkOk.CreateSender(CreateVkOkSenderParams{
 		Name:        "Test",