How to get user id from a given mail [duplicate]

Question

I need to get the user ID when I input the mail of the user.

Is it possible?

Of course I have an authenticated user who is asking for the mail of a user already created.

I want to retrieve users like

var refer = firebase.auth ().ref ('[email protected]') refer.on ('value', function (snapshot) { console.log (snapshot.val()); })

But in a possible way.

firebase.auth ().ref ('[email protected]') I don't think that is the auth service has a ref() method: firebase.google.com/docs/reference/js/firebase.auth.Auth. — Frank van Puffelen
– Frank van Puffelen, Commented Oct 17, 2016 at 18:26
Aside from that: there is no API to look up the uid of a user based on their email address in Firebsae Authentication. If you need that functionality, you'll need to store the mapping yourself ; for example in the Firebase Database. — Frank van Puffelen
– Frank van Puffelen, Commented Oct 17, 2016 at 18:30

Community · Accepted Answer · 2017-05-23 12:17:36Z

Store the user info you want on a separate node in your database structure, then when the user asks for that, you retrieve from that endpoint.

See these:

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