获取支付宝小程序的用户ID和accesstoken
```javascript
WXAPI.userAliappInfo(token)
```
+ token 当前用户登陆凭证
```json
{
"code": 0,
"data": {
"accessToken": "authbseB68b3a90026374598a72b3365513c2X11",
"userId": 2763707,
"aliUserId": "2088002008485111"
},
"msg": "success"
}
```
+ aliUserId 用户在支付宝的用户ID
+ accessToken 该用户的小程序 accesstoken