Is there a way to use email + secret instead of Access Key + Secret with SES SMTP Credentials?

Hi, We recently converted our SES Sandbox to production to be used for a specific Use Case. The third party we are working with expect the credentials to have email + password instead of Access Key + Password. Please see attached screen shot. We were just wondering if there is a way to generate credenatials in such a way. If so could you please let us know? We followed creating SMTP credentials and got the Credentials associated with an IAM user.