Roles
Grants particular privileges to entities like users and applications

GET /v2/roles
Return all the roles

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

GET /v2/roles/:id
Get a role

POST /v2/roles
Create a role

PATCH /v2/roles/:id
Update a role

PUT /v2/roles/:id
Update a role

DELETE /v2/roles/:id
Destroy a role