```javascript
WXAPI.register_tt({
code: '',
avatarUrl: '',
province: '',
city: '',
nickName: '',
postJsonString: '',
referrer: ''
})
```
+ code calls the login interface of the Byte applet to obtain the user's temporary code
+ nickName user nickname
+ avatarUrl User avatar
+ province the province where it is located
+ city city
+ postJsonString json data of user's extended attributes (requires string)
+ referrer The referrer information saved when registering this user
```json
{
code: 0,
msg: 'success'
}
```