code: def auth_userpass(self, username, password, mount_point='userpass', use_token=True, **kwargs):
          
          params = {
              'password': password,
          }
  
          params.update(kwargs)
  
          return self.login('/v1/auth/{0}/login/{1}'.format(mount_point, username), json=params, use_token=use_token)
docs: POST /auth/<mount point>/login/<username>
  
          :param username:
          :type username:
          :param password:
          :type password:
          :param mount_point:
          :type mount_point:
          :param use_token:
          :type use_token:
          :param kwargs:
          :type kwargs:
          :return:
          :rtype: