Function router 

pub fn router(
    auth: AuthService,
    db: Db,
    app_resources: Vec<Resource>,
    app_settings: Vec<SettingsItem>,
    app_permissions: Vec<Permission>,
    config: AdminConfig,
) -> Router

Builds the admin router. app_resources are the application’s own list/form screens; app_settings are its settings models; app_permissions are the permissions it defines, offered in the role editor alongside the framework’s. All are mounted alongside the framework’s built-in equivalents.