/**
  * 自动登录, 首次登录则生成会员
  * @param string $tk 令牌
  */
 public function bulidMem($tk, $mid = null)
 {
     if ($this->_idtoken($tk)) {
         //验证成功
         $member_M = new MemberModel();
         $newid = $member_M->bulidNew($mid);
         if (false === $newid) {
             $this->error($member_M->getError());
         }
         $this->success($newid);
     } else {
         //验证失败
         $this->error("非法操作!!!");
     }
 }