Changes to Create authentication token

for the path request parameter clientId, the format changed from no format to uuid

the expires_at response's property format changed from date-time to no format for status 200

api tag Authentication added

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 500

the response property client_credential_id became required for the status 200

the response property client_id became required for the status 200

the response property created_at became required for the status 200

the response property deleted_at became required for the status 200

the response property expires_at became required for the status 200

the response property id became required for the status 200

the response property status became required for the status 200

the response property token became required for the status 200

the response property updated_at became required for the status 200