- Using `AnonymousAuthProvider` signInOptions does not work with `react-firebaseui`. - It throws the following error: `Uncaught TypeError: fn(...).signInAnonymously is not a function` Below is what my `uiConfig` looks like. ``` import { auth as firebaseuiAuth } from 'firebaseui'; const uiConfig = { signInFlow: 'popup', signInOptions: [ firebaseuiAuth.AnonymousAuthProvider.PROVIDER_ID, ], }; ```