Email login

```javascript WXAPI.login_email({ email: 'test@qq.com' }) ``` + email email address + pwd login password + deviceId Login device ID, just customize it + deviceName Login device name, you can customize it + expireSeconds login expiration time (seconds), pass -1 to mean never expires ```json { "code": 0, "data": { "token": "383dffca-80bd-47d7-85c7-55396006ee3a", "uid": 8551746 }, "msg": "success" } ```