we use gmail login in our mobile application,
but recently we discovered that lots of users don't have e-mail adresses in our database. But they have gmaild in our databases. We use GoogleSignIn for getting gmail information. After the tests we saw that, sometimes that api doesn't bring the gmail adress. If we don't get the mail adress we only insert gmailid to our database.
How can we find gmail adresses from gmaildIds.
example gmaild Id= 116333385622785111111