4.6.6 Access Token Response for Multi-Resource Refresh Token Request

Refer to [RFC6749] section 5.1 (Successful Response).

       HTTP/1.1 200 OK
       Content-Type: application/json;charset=UTF-8
       Cache-Control: no-store
       Pragma: no-cache
       {
         "access_token":"X0RJQk5FS1NESlNabFNE",
         "token_type":"bearer",
         "expires_in":3600,
         "refresh_token":"U0lETkRKNDMyMzRORVVE"
       }