Firebase authentication issue

good morning I have a question

Is it that I make an application in kodular where I use firebase authentication, the application works but when I upload it to the store it stops working, what could it be?

after uploading the sha1 key must replac with play store sha1 key

I don’t understand what a shame I should change the SHA 1 key that kodular had for the one that the play store throws and how do I change that or should I change the signature in firebase