Unable To Connect Firebase To Android App | This App Is Not Authorized To Use Firebase Authentication

I know this question is already asked many times. But I have done the following things still I am getting an error 'This app is not authorized to use Firebase Authentication.Please

Solution 1:

I had this same error when I was using Phone number authentication. Make sure you complete Android Device Check API requirements. This will enable your devices to be recognized. use https://console.cloud.google.com/apis/library/androidcheck.googleapis.com?project=capital-insider&folder=&organizationId=https://console.cloud.google.com/apis/library/androidcheck.googleapis.com?project=capital-insider&folder=&organizationId=

and make sure you have added your app.

Solution 2:

I have solved the problem:

1. Go to google console
2. Select your project
3. APIs & Services -> Credentials
4. Make sure your app package name is registered with any OAth client ids
5. If not change it accordingly.
6. If you have the app in the store. Copy the sha1 key from the play console dashboard and change sha1 also.