docs: def update_user_display_name(user,**kwargs):
      """
          Update a user's display name
      """
      #check_perm(kwargs.get('user_id'), 'edit_user')
      try:
          user_i = db.DBSession.query(User).filter(User.id==user.id).one()
          user_i.display_name = user.display_name
          return user_i
      except NoResultFound:
          raise ResourceNotFoundError("User (id=%s) not found"%(user.id))