Events users
Users registered to an event

GET /v2/users/:user_id/events_users
Return all the events users of the given User

GET /v2/events/:event_id/events_users
Return all the events users of the given Event

GET /v2/events_users
Return all the events users

GET /v2/events_users/:id
Get an events user

POST /v2/events_users
Create an events user

PATCH /v2/events_users/:id
Update an events user

PUT /v2/events_users/:id
Update an events user

DELETE /v2/events_users/:id
Destroy an events user