[Feature request] Support for OpenID Connect about repman HOT 1 OPEN

I was currently thinking about Okta integration, as we use this for internal user authentication. Okta does support OICD, but the first question to tackle is on how to integrate this.

In it's current form, SSO providers like GitLab have to be configured by the instance admin via Environment Variables. However, this means the Repman.io SaaS offering can not easily connect to your custom GitLab instance or GitHub Enterprise (as far as I know off).

Sentry handles this differently, it offers the SSO configured per organization. Some examples:

Login Flow

Regular login page, for non-SSO users

The ability login with sso for an organization can be done by going to [instancehost].com/[organization alias] or selecting the tab on the login page and filling out the organization alias:

After that you will be greeted with a screen of the available SSO options:

Configuring SSO

SSO can be configured in the Organization Settings -> auth, you will see a list of SSO providers available:

Then it's just a matter of configuring:

This could also pave the way for #58 and others

from repman.