Thanks for your fast reply, but it does'nt work. When I go to .../auth, I still get the LDAP login, so I can't enter the normal admin login/password

You have to login using the one time loging token which you generate server side (command line) using /path/to/phabricator/bin/auth recover jpchristie.
Normally it pass all other auth. Then once loged in as administrator you can edit auth providers using auth administration.

It should work, at least so does it three month ago. If not, it is a bug, so please open a bug ticket with some log so core devs can figure out why you can't log with token.

Ok, it works, thanks!

I edited the answer to make it more clear.
If it works, you can upvote the answer and close the question as resolved.