fix: support authentication with Open ID using Keycloak

[taprosoft]

Description

This PR aims to add support for Keycloak authentication while implementing a conditional check to differentiate between the two methods. The system should properly handle authentication based on the selected provider.
You can activate the authentication by keycloak by declaring in the .env :
AUTHENTICATION_METHOD="KEYCLOAK"

• Fixes [REQUEST] Authentication method with Keycloak and OpenID #660

Type of change

• New features (non-breaking change).
• Bug fix (non-breaking change).
• Breaking change (fix or feature that would cause existing functionality not to work as expected).

Checklist

• I have performed a self-review of my code.
• I have added thorough tests if it is a core feature.
• There is a reference to the original bug report and related work.
• I have commented on my code, particularly in hard-to-understand areas.
• The feature is well documented.