sdk/src/com/socialize/SocializeServiceImpl.java
@Override
	public synchronized void authenticate(Context context, SocializeAuthListener authListener) {
		if(assertInitialized(context, authListener)) {
			userSystem.authenticate(context, authListener, this);
		}
	}
@Override
	public synchronized void authenticate(Context context, SocializeAuthListener authListener) {
		if(assertInitialized(context, authListener)) {
			userSystem.authenticate(context, authListener, this);
		}
	}
/*
(non-Javadoc)
@see com.socialize.SocializeService#authenticate(android.content.Context, com.socialize.listener.SocializeAuthListener)