First, you need to use the login api of `byte applet` to obtain the temporary `code` of the current user, and then use the code to log in:
["Toutiao Mini Program Login API Instructions"](https://microapp.bytedance.com/docs/zh-CN/mini-app/develop/api/open-interface/log-in/tt-login)
After getting the `code`, complete the login:
```javascript
WXAPI.login_tt(code)
```
+ code The user temporary code of the byte applet obtained in the previous step
```json
{
"code": 0,
"data": {
"uid": 2101167,
"openid": "ccc11f02-e98a-4098-9672-1f000f890b51",
"token": "2c4c04cc-91f8-4643-a51e-775fde4a3448"
},
"msg": "success"
}
```
+ uid After successful login, return the user number
+ openid is the openid of the current byte user corresponding to the current applet
+ mobile is the current user’s mobile phone number
+ token is the token returned after the user logs in. Many subsequent user-related operations require the token to be operated.