docs: def set_user_role(new_user_id, role_id, **kwargs):
      """
          Apply `role_id` to `new_user_id`
  
          Note this function returns the `Role` instance associated with `role_id`
      """
      #check_perm(kwargs.get('user_id'), 'edit_role')
      try:
          _get_user(new_user_id)
          role_i = _get_role(role_id)
          roleuser_i = RoleUser(user_id=new_user_id, role_id=role_id)
          role_i.roleusers.append(roleuser_i)
          db.DBSession.flush()
      except Exception as e: # Will occur if the foreign keys do not exist
          log.exception(e)
          raise ResourceNotFoundError("User or Role does not exist")
  
      return role_i