Hmmm... Doesn't do what I thought (making it easier for myself).
Seems I have to do a double select on that one, identifiing user by password in the select-string. Requires some major redesign on the website, as I so far worked with unencrypted password, which I checked on the return, providing different errors for password invalid, password missing or user invalid.
Anyone having an idea how to make this check as part of a PHP script instead of a SELECT, I appreciate it.