code: public function moveUser($openId, $groupId)
      {
          $params = [
                     'openid' => $openId,
                     'to_groupid' => $groupId,
                    ];
  
          return $this->parseJSON('json', [self::API_MEMBER_UPDATE, $params]);
      }
docs: Move user to a group.
  
  @param string $openId
  @param int    $groupId
  
  @return \EasyWeChat\Support\Collection