Changes to Retrieve competitors of a set of events.

added the non-success response with the status 401

added the required property competitors/items/country_code to the response with the 200 status

the response's body type changed from object to no type for status 400

the response property competitors/items/short_code became nullable for the status 200

the response property competitors/items/short_name became nullable for the status 200

the response property competitors/items/type became nullable for the status 200

the data response's property type changed from null to object for status 500

the data response's property type changed from string to string object for status 400

added the non-success response with the status 414

added the non-success response with the status 503

removed the undefined enum value from the competitors/items/type response property for the response status 200