Lines 2-8 (see above ↑) deal with the case of existing user, and the rest deal with the case of new user.

When reading lines 3-5 you have to remember that you're dealing with an existing user, same with lines 12-22, only there you deal with a new user. After all, both existing user and new user cases use same variable name: user.

But there's a better way than keeping it in your head. Keeping it in the code:

Reading lines 3-5 (see above ↑), you clearly see that you're dealing with an existing user. And same for the lines dealing with a new user.

Happy hacking!

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