This code sucks.

[CookieStudios5609]

This code sucks, and you shouldn't've followed that terrible tutorial.

Issue: After reading docs, you can very easily see that all encoding or decoding can be done in one line using e = b64encode(variable_that_holds_user_input.encode("utf-8")) or e = b64decode(variable.encode()) and then e.decode()

Solution: Replace the relevant lines of code with these much shorter and more sensible ones.