```javascript
WXAPI.modifyPayPassword(token, pwdOld, pwdNew)
```
+ token current user login credentials
+ pwdOld original transaction password
+ pwdNew new transaction password
If you have not set a transaction password, please directly call the `Set transaction password for the first time` method
If you forget your original transaction password, please directly call the `reset transaction password` method
```json
{
code: 0,
msg: 'success'
}
```