LogInCallback

```
public interface LogInCallback
```
A LogInCallback is used to run code after logging in a user.
The easiest way to use a LogInCallback is through an anonymous inner class. Override the done function to specify what the callback should do after the login is complete. The done function will be run in the UI thread, while the login happens in a background thread. This ensures that the UI does not freeze while the save happens.
For example, this sample code logs in a user and calls a different function depending on whether the login succeeded or not.
```
 ParseUser.logInInBackground("username", "password", new LogInCallback() {
   public void done(ParseUser user, ParseException e) {
     if (e == null && user != null) {
       loginSuccessful();
     } else if (user == null) {
       usernameOrPasswordIsInvalid();
     } else {
       somethingWentWrong();
     }
   }
 });
 
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`done(ParseUser user, ParseException e)`	Override this function with the code you want to run after the save is complete.

- Method Detail
  - done
```
void done(ParseUser user,
          ParseException e)
```
    Override this function with the code you want to run after the save is complete.
    
    Parameters:
    
    user - The user that logged in, if the username and password is valid.
    
    e - The exception raised by the login, or null if it succeeded.