How to setup firebase realtime DB authentication using only one account for all the users

How to setup firebase realtime DB authentication using only one account for all the users

In my android app I don't want users to login individually yet. I want to set one single account for authentication for all the users to read and write data to Firebase realtime database. I will have to write username and password inside the code. if I use proguard will it be possible for anyone to decompile and see this authentication info? I am asking because proguard doesn't mask everything. and also is this a good way to do authentication using single account?

In my android app I don't want users to login individually yet. I want to set one single account for authentication for all the users to read and write data to Firebase realtime database. I will have to write username and password inside the code. if I use proguard will it be possible for anyone to decompile and see this authentication info? I am asking because proguard doesn't mask everything. and also is this a good way to do authentication using single account?

I have searched for possible solution regarding this. But found no answer. Everyone does user logins and use that info for authentication.

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