swift – what's a bucket provided?

So, I'm looking at a tutorial and I wanted to use the existing code written and add it to my fire base. I have successfully created an account and imported GoogleService-Info that has been downloaded. no other changes were made there

So now, I want to create a user but it does not work

I receive this error

"NSInvalidArgumentException", reason: "Tray provided: random.appspot.com does not match the storage bucket of the current instance: random2.appspot.com"

I can see the user being created in my fire base, but that's all. The profile picture, however, does not work. even if storage is enabled.
No suggestion?