Deprecate login command (#2310)

cmd/login.go

@@ -23,6 +23,7 @@ package cmd
 import (
 	"context"
 	"errors"
+	"fmt"
 	"strings"
 
 	"github.com/Azure/azure-storage-azcopy/v10/common"
@@ -31,6 +32,10 @@ import (
 
 var loginCmdArg = loginCmdArgs{tenantID: common.DefaultTenantID}
 
+var loginNotice = "'azcopy %s' command will be deprecated starting release 10.22. " +
+				  "Use auto-login instead. Visit %s to know more."
+var autoLoginURL = "https://learn.microsoft.com/en-us/azure/storage/common/storage-use-azcopy-authorize-azure-active-directory#authorize-without-a-secret-store "
+
 var lgCmd = &cobra.Command{
 	Use:        "login",
 	SuggestFor: []string{"login"},
@@ -45,6 +50,7 @@ var lgCmd = &cobra.Command{
 		loginCmdArg.clientSecret = glcm.GetEnvironmentVariable(common.EEnvironmentVariable.ClientSecret())
 		loginCmdArg.persistToken = true
 
+		glcm.Info(fmt.Sprintf(loginNotice, "login", autoLoginURL))
 		if loginCmdArg.certPass != "" || loginCmdArg.clientSecret != "" {
 			glcm.Info(environmentVariableNotice)
 		}

cmd/logout.go

@@ -53,6 +53,7 @@ func init() {
 type logoutCmdArgs struct{}
 
 func (lca logoutCmdArgs) process() error {
+	glcm.Info(fmt.Sprintf(loginNotice, "logout", autoLoginURL))
 	uotm := GetUserOAuthTokenManagerInstance()
 	if err := uotm.RemoveCachedToken(); err != nil {
 		return err