Changes to GET /api/categories/:id

api path removed without deprecation

endpoint added

the videocount response's property type changed from string to integer for status 200

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 405

added the non-success response with the status 406

added the non-success response with the status 415

added the non-success response with the status 500