How to use the angular-auth-oidc-client.AuthorizationState.authorized function in angular-auth-oidc-client

private onAuthorizationResultComplete(authorizationResult: AuthorizationResult) {

        const path = this.read('redirect');
        console.log('Auth result received AuthorizationState:'
            + authorizationResult.authorizationState
            + ' validationResult:' + authorizationResult.validationResult);

        if (authorizationResult.authorizationState === AuthorizationState.authorized) {
            this.router.navigate([path]);
        } else {
            this.router.navigate(['/Unauthorized']);
        }
    }