Editing Firebase DB API Using blocks

I need to edit or add replace existing API with another one while using the app, is that possible by anyway ?
Thanks a lot in advance .

Any help please ?!
I need to let the user to enter his own Firebase account, Is that possible ?

That sounds like hard work. What are you attempting to accomplish by doing this?

Hi, @jared
Thanks for your reply, I wanna make an app let the user to use his own firebase to make a specific operations .