code: def remove_role_from_user(self, user, role):
          
          user, role = self._prepare_role_modify_args(user, role)
          result = self.UserRole.select().where(
              self.UserRole.user == user,
              self.UserRole.role == role,
          )
          if result.count():
              query = self.UserRole.delete().where(
                  self.UserRole.user == user, self.UserRole.role == role)
              query.execute()
              return True
          else:
              return False
docs: Removes a role from a user.
  
          :param user: The user to manipulate
          :param role: The role to remove from the user