Keycloak authentication

In the server log I have (tags replace sensitive data):

2020-11-16 10:24:57,023 27111 DEBUG odoo odoo.modules.registry: Multiprocess signaling check: [Registry - 10 -> 10] [Cache - 33 -> 33]

2020-11-16 10:24:57,025 27111 INFO odoo werkzeug: <ip> - - [16/Nov/2020 10:24:57] "GET /auth_oauth/signin HTTP/1.1" 200 - 1 0.000 0.002

2020-11-16 10:24:57,189 27111 DEBUG odoo odoo.modules.registry: Multiprocess signaling check: [Registry - 10 -> 10] [Cache - 33 -> 33]

2020-11-16 10:24:57,190 27111 ERROR odoo odoo.addons.auth_oauth.controllers.main: auth_signup not installed on database odoo: oauth sign up cancelled.

2020-11-16 10:24:57,192 27111 INFO odoo werkzeug: <ip> - - [16/Nov/2020 10:24:57] "GET /auth_oauth/signin?state=<some_code><domain><some_code>&session_state=<session_state>&access_token=<access-token>&token_type=bearer&expires_in=899 HTTP/1.1" 303 - 1 0.000 0.004

2020-11-16 10:24:57,273 27111 DEBUG odoo odoo.modules.registry: Multiprocess signaling check: [Registry - 10 -> 10] [Cache - 33 -> 33]

The log in Keycloak shows that is all correct (I see the auth Id), but for some reason, Odoo is denying the access. I've tried both tutorials above, but none of them worked for me, the best shot I get is "sign up is not allowed". The auth_signup is installed, so I don't know how to proceed.

The provider config in Odoo:

https://snipboard.io/g5SYKa.jpg

Using the keycloak module (first link), Odoo tries to find the client secret, which is not provided and seems to not be mandatory. And using the second, I have to comment all the lines related to "validation", as the variable is not found.

Here you can find the current /usr/lib/python3/dist-packages/odoo/addons/auth_oauth/model/res_users.py:

https://pastebin.com/MANq0GYV

Any help, would be appreciated :)

Regards

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