Firestore get DocumentSnapshot's field's value

Question

If I have a Firebase Firestore database which I have retrieved a DocumentSnapshot for the document corresponding to the collection on the right and stored in a

Answer 1

Here is another simple way to get document value(in your case):

Firestore.instance
.collection('users').document('xsajAansjdna')
.get()
.then((value) =>
print("Fetched ==>>>"+value.data["username"]));