const theuser = firebase.auth().currentUser;

    console.log(theuser.email)

    theuser.updateProfile({

      displayName: firstName + lastName,

      photoURL: uploadUri,

    })

 var user = firebase.auth().currentUser;user.updateProfile({  displayName: "Jane Q. User",  photoURL: "https://example.com/jane-q-user/profile.jpg"}).then(function() {  // Update successful.}).catch(function(error) {  // An error happened.});