Using firebase as authentication provider and it works, using this url :
https://www.googleapis.com/identitytoolkit/v3/relyingparty/verifyPassword?key=XXXXX
once i try to configure this as an identity provider on keycloak, the

Authorization URL *
Token URL *

it generates a url of the client that responds 404 when you try to use it.

how to configure the keycloak using firebase as identity provider ?