Function preloadUser

src/auth.tsx:11–15

(authResolver: () => Promise<Auth>)

type Claims = IdTokenResult['claims'];

export async function preloadUser(authResolver: () => Promise<Auth>) {
  const auth = await authResolver();
  const user$ = preloadObservable(user(auth), `auth:user:${auth.name}`);
  return user$.toPromise();
}

/**
 * Subscribe to Firebase auth state changes, including token refresh