Changes to List Messages

added the new login_code_valid enum value to the items/template_type response property for the response status 200

added the new registration_code_valid enum value to the items/template_type response property for the response status 200

added the optional property items/channel to the response with the 200 status

removed the otp enum value from the items/template_type response property for the response status 200

deleted the query request parameter page

deleted the query request parameter per_page

added the new optional query request parameter page_size

added the new optional query request parameter page_token

added the optional property items/dispatches to the response with the 200 status

the response property items/body became required for the status 200

the response property items/created_at became required for the status 200

the response property items/id became required for the status 200

the response property items/recipient became required for the status 200

the response property items/send_count became required for the status 200

the response property items/status became required for the status 200

the response property items/subject became required for the status 200

the response property items/template_type became required for the status 200

the response property items/type became required for the status 200

the response property items/updated_at became required for the status 200

endpoint added

api path removed without deprecation