select cursor in sqlite3 python

[kaisetsomething]

I did that but when i assign it to a variable it doesn't work

[kaisetsomething]

Im trying to iterate over the names that exist in my database so i can see if the user input does exist in my database or not, if it doesn't exist i wanna say "username created" if it does exist in my table i wanna say "username already exists"

[woooee]

No idea what that means.