writefreely configuration

[Tealk]

Hi all, I'm trying to connect my writefreely instance to authentik but unfortunately it's not quite working.

My conifugration:

[oauth.generic]
client_id          = xxx
client_secret      = xxx
host               = https://auth.rollenspiel.monster
display_name       = authentik
callback_proxy     = 
callback_proxy_api = 
token_endpoint     = /application/o/token/
inspect_endpoint   = /application/o/userinfo/
auth_endpoint      = /application/o/authorize/
scope              = openid profile email
allow_disconnect   = false
map_user_id        = sub
map_username       = nickname
map_display_name   = name
map_email          = email

When I go to login, I am redirected to authentik and then back to writefreely but then I get the following error message: User doesn't exist.

I have also asked in the writefreely forum, but there the answers are very rare: https://discuss.write.as/t/authentik-oauth-setup/8271

I thought maybe there is someone here who has already done this or sees my mistake.

[Tealk]

Is probably a feature or bug that with closed registration also no oauth registration is possible.