OnUsernameCheckListener

```
public interface OnUsernameCheckListener
```
Interface for callbacks when a username check is performed.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void onUsernameCheck(boolean usernameExists)
  Called when a username check is performed.

- Method Detail
  - onUsernameCheck
```
void onUsernameCheck(boolean usernameExists)
```
    Called when a username check is performed.
    
    Parameters:
    
    usernameExists - whether the IMEI exists or not