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Write a method that takes an array of characters and reverses the letters in place.

Why an array of characters instead of a string?

The goal of this question is to practice manipulating strings in place. Since we're modifying the input, we need a mutable type like an array, instead of Java's immutable strings.

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Where do I enter my password?

Actually, we don't support password-based login. Never have. Just the OAuth methods above. Why?

  1. It's easy and quick. No "reset password" flow. No password to forget.
  2. It lets us avoid storing passwords that hackers could access and use to try to log into our users' email or bank accounts.
  3. It makes it harder for one person to share a paid Interview Cake account with multiple people.

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