Quests users
Users which earned an quest

GET /v2/quests_users/graph(/on/:field(/by/:interval))
Return grouped temporal data on quests users

GET /v2/quests/:quest_id/quests_users
Return all the quests users of the given Quest

GET /v2/users/:user_id/quests_users
Return all the quests users of the given User

GET /v2/quests_users
Return all the quests users

GET /v2/quests_users/:id
Get a quests user

POST /v2/quests_users
Create a quests user

PATCH /v2/quests_users/:id
Update a quests user

PUT /v2/quests_users/:id
Update a quests user

DELETE /v2/quests_users/:id
Destroy a quests user