[BUG] Configuring Taiga to login via GitLab

[nemonik]

Describe the bug

https://github.com/kaleidos-ventures/taiga-docker/#gitlab-settings

As well as, section 1.5 under "Gitlab settings" https://docs.taiga.io/setup-production.html#setup-prod-with-docker

Explains how to configure Taiga to login via GitLab, but this feature when configured does not appear to work nor are the scopes one must configure in GitLab (https://{YOUR-GITLAB}/admin/applications

How can we reproduce the behavior

Configure as your documentation describes with a self hosted GitLab, such as https://github.com/sameersbn/docker-gitlab

Workarounds

N/A

Screenshots

N/A

Taiga environment

Self-hosted. Nothing in logs from tagia-front nor taiga-back.

Arch Linux latest Chrome browser

Additional context

N/A