code: def alter_database_admin(self, username, is_admin):
          
          url = "db/{0}/users/{1}".format(self._database, username)
  
          data = {'admin': is_admin}
  
          self.request(
              url=url,
              method='POST',
              data=data,
              expected_response_code=200
          )
  
          return True
docs: Alter the database admin.