Add redirection into registration page in keycloak

[ikhomutov]

Title

Add redirection into registration page in keycloak

Summary

Right now the GGK only redirect user into login page in keycloak, using this link
https://<DOMAIN>/realms/<REALM_NAME>/protocol/openid-connect/auth?client_id=<KEYCLOAK_CLIENT_ID>&scope=openid%20profile&redirect_uri=<REDIRECT_URL>&response_type=code
If the registration is enabled in keycloak, it is possible to navigate the user directly into the registration page using following link:
https://<DOMAIN>/realms/<REALM_NAME>/protocol/openid-connect/registrations?client_id=<KEYCLOAK_CLIENT_ID>&scope=openid%20profile&redirect_uri=<REDIRECT_URL>&response_type=code
It would be perfect for GGK to be able to form this url and redirect user directly into registration page

Why?

Usually on a website there are separate buttons 'Sign In' and 'Sign Up'/'Join' that lead into separate pages. Right now I can only have one button 'Login' which will lead into a login page inside a keycloak with the separate link into registration form. This is not very convenient from the user perspective.

How

Add a separate configuration parameter --enable-registration, which if enabled, activate a separate route inside GGK /oauth/registration, which will form the correct registration url and redirect user into it.

Acceptance criteria

It is possible to redirect user directly into a registration page inside keycloak

Additional Information

Maybe this is already possible but I didn't find anything about it in the documentation

[p53]

Hi thank you for opening issue! This is not yet possible in gogatekeeper, I think it might be useful feature