Changes to Add guests to plan by ID

request body became required

added the pattern ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$ to the path request parameter id

the request property guests became optional

media type application/json; charset=utf-8 was changed to application/json for the response status 201

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 403

added the non-success response with the status 404

added the non-success response with the status 429