code: public function invite($account, $wechatId)
      {
          $params = [
                     'kf_account' => $account,
                     'invite_wx' => $wechatId,
                    ];
  
          return $this->parseJSON('json', [self::API_INVITE_BIND, $params]);
      }
docs: Invite a staff.
  
  @param string $account
  @param string $wechatId
  
  @return \EasyWeChat\Support\Collection