Different experience for logged in user

[mikelbrierly]

User Story:

As a User,
I want the site to reflect a difference when I am logged in,
So that I know that I am logged in, and how to manage my account

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Acceptance Criteria:

• When a user is logged in, change the "Sign Up" button to say "My Account"
• The modal should have 3 new options now:
  • Log out
  • Switch user
• Log out and switch user just need to revoke the token that lives in the browsers cookie.
• Make sure to set the state or reload the page if the user changes or is logged out