Allow Catniss to sign out

[nstringham]

Catniss should be able to sign out of her account by clicking "sign out" in the dropdown. because she doesn't want her family (who she shares a computer with) to mess up win steak by playing on her account.

Acceptance Criteria:

• If user is not logged in, Sign Out button will not show as an option.
• If user is logged in, Sign Out button will log the user out.
• If user is logged in, user should be able to see their data from Database
• If user is not logged in, user should not be able to see previous user data from Database

Tasks:

• [x] Sign Out button and drop down in Frontend.
• [x] Backend should connect Sign Out button with Database.

[nstringham]

Display name is visible after logging out

[nstringham]

maybe reload the page after logging out