invoiceninja/app/handlers/UserEventHandler.php

<?php

class UserEventHandler
{
	public function subscribe($events)
	{
		$events->listen('user.signup', 'UserEventHandler@onSignup');
		$events->listen('user.login', 'UserEventHandler@onLogin');		

		$events->listen('user.refresh', 'UserEventHandler@onRefresh');		
	}

	public function onSignup()
	{
		dd('user signed up');
	}

	public function onLogin()
	{
        $account = Auth::user()->account;
        $account->last_login = Carbon::now()->toDateTimeString();
        $account->save();

        Event::fire('user.refresh');
	}

	public function onRefresh()
	{
		Auth::user()->account->loadLocalizationSettings();
	}
}