curl --request GET \
  --url https://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/smtp-credentials \
  --header 'Authorization: <api-key>'

{
  "status": "<string>",
  "data": {
    "credentials": [
      {
        "description": "<string>",
        "createdAt": "<string>",
        "username": "<string>"
      }
    ]
  }
}