addRole - post /{groupId?}/users removeRole - delete /{groupId?}/users
list - get / add - post / update - put /{groupId} delete - delete /{groupId}
list - get /{groupId}/collections/ add - post /{groupId}/collections/ update - put /{groupId}/collections/{collectionId} delete - delete /{groupId}/collections/{collectionId}
list - get /{groupId}/collections/ add - post /{groupId}/collections/{collectionId}/ update - put /{groupId}/collections/{collectionId}/{itemId} delete - delete /{groupId}/collections/{collectionId}/{itemId}