How to provide user login with a username and NOT an email?

Question

I\'d like to use Firebase for my web app that is for people with dementia in a care home. They do not have email or social network accounts so will need a simple username /

Answer 1

You are correct that username/password sign-in is not supported natively in Firebase Auth at this moment.

You can implement a custom provider as shown in this example. This allows you to meet any custom requirements, but is admittedly a bit more involved than using the built-in providers. There is an example of this here that you can use as a starting point.

A workaround you could take without needing to use custom auth with another backend is to accept usernames in your UI, but on the underlying logic, append "@yourowndomain.com" before calling the functions to sign up or sign in with email.

So you would be using email/password authentication, mapping to @yourowndomain.com