[eluser]Grahack[/eluser]
That's because my plan is not to use the Vanilla auth form that calls this function.
In fact it's not clear on my wiki page but what I did was:
1) disable the Vanilla form (just delete the link 'login' in the templates)
2) if Vanilla complains that the user is not authenticated, we must go to FAL's form:
Code:
$Configuration['SAFE_REDIRECT'] = '../index.php/auth/';
But if you have time, I'd be happy if you could implement this Authenticate() function.