code: def add_cluster_admin(self, new_username, new_password):
          
          data = {
              'name': new_username,
              'password': new_password
          }
  
          self.request(
              url="cluster_admins",
              method='POST',
              data=data,
              expected_response_code=200
          )
  
          return True
docs: Add cluster admin.