Is it possible to verify the email domain zone in Firebase Authentication?
For instance, I am interested in allowing successful registrations for emails from Yahoo and Gmail (@yahoo.com, @gmail.com emails).
p.s. While validation on the client side is an option, it may not be sufficient.
Regrettably, it is not possible to verify the email domain prior to registration without client-side validation.
You have a couple of options available to you:
For instance:
"rules": {
".read": "auth.token.email.endsWith('@gmail.com')",
".write": "auth.token.email.endsWith('@gmail.com')"
}
}
or something along these lines:
"rules": {
".read": "auth.token.email_verified == true && auth.token.email.matches(/.*@gmail.com$/)",
".write": "auth.token.email_verified == true && auth.token.email.matches(/.*@gmail.com$/)"
}
}
Credits:
For example:
exports.validateUser = functions.auth.user().onCreate((user) => {
if (!user.email.matches(/.*@gmail.com$/)) {
admin.auth().updateUser(data, {
disabled: true
});
}
});
Credits: https://firebase.google.com/docs/functions/auth-events
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