Enable authentications

23.- Click on Authentication and select the Sign-in method.

24.- Select Email/password, click on Activate, and Save.

25.- If one of your apps uses “Sign-in with Google”, click on Activate, select your email address and click on Save.

26.- In the same section, in the lower part, you’ll find several accounts for the email address and click on Save, select Allow the creation of many accounts with the same email address, and click on Save.