importfirebasefrom'firebase/compat/app'import'firebase/compat/auth';import*asfirebaseuifrom'firebaseui'import'firebaseui/dist/firebaseui.css'constfirebaseConfig={...};constapp=firebase.initializeApp(firebaseConfig);constauth=firebase.auth(app);auth.onAuthStateChanged(user=>{// Problem: authResult.user.providerData is empty after signin with firebaseui, ❌// but has one element when using auth.signInWithEmailAndPassword() directly ✅console.log("user signed in",user);})constsignInSuccessWithAuthResult=(authResult: any,redirectUrl?: string)=>{console.log("authResult",authResult);// Problem: authResult.user.providerData is empty! ❌auth.signOut();returnfalse;}constui=newfirebaseui.auth.AuthUI(auth);ui.start('#root',{signInOptions: [firebase.auth.EmailAuthProvider.PROVIDER_ID],callbacks: { signInSuccessWithAuthResult,},});

auth.signInWithEmailAndPassword("my-email@email.de","password").then(credential=>{console.log("signInWithEmailAndPassword",credential);// credential.user.providerData.length === 1 ✅returnauth.signOut();})