Support string URL for config in provideKeycloak (as in keycloak-js)

[A77AY]

Previously, and even now, it is possible to use a string URL for config in provideKeycloak, but the current typings prevent this. The suggested workaround with preloading the config is not a good solution.

provideKeycloak({ config: '/keycloak.json' })

[erhanilze]

keycloak-js supports using a string URL for config

Loading Keycloak config from URL

[antsfiles]

Not being able to control when keycloak is initialized is an issue for me.
I would be nice to initialize keycloak with the "config" later, or in a custom app initializer.

[DaSchTour]

It works when "overwriting" the typings

    provideKeycloak({
      config: '/keycloak.json' as any,
    }),