docs: adds enterprise mention

site/content/docs/accounts-and-users/creating-api-key.md

@@ -42,6 +42,10 @@ If you wish to revoke access of a user to an account, remove the user from the t
 Service API keys are specific to one account and are not tied to a user. This means that service API keys can be used to 
 access your account even if the user that created the API key is removed from your account.
 
+{{< info >}}
+Service API keys are available on the [Enterprise plan](https://www.checklyhq.com/pricing) only
+{{< /info >}}
+
 Service API keys allow you to set a role access level on the key itself, e.g. "read only", "admin" etc. 
 
 Prime use cases for service API keys are:
@@ -51,7 +55,6 @@ Prime use cases for service API keys are:
 - Replacing user API keys for customers using our SSO integration and cannot create "service users" in their user directories
 due to compliance reasons.
 
-
 **Steps to create a service API key:**
 
 Only users with the Admin and Owner role can create service API keys.