[BUG] Expired session should redirect to Login Page

[DMalone87]

Describe the bug
When an API call is made that requires an authenticated user, the app currently fails without giving a clear reason to the user. In cases where the API returns an "Unauthorized" response, we should redirect the user to the login page.

To Reproduce
Steps to reproduce the behavior:

1. Log in to the application
2. Visit the search page
3. Allow the session token to expire, but stay on the search page
4. Attempt to make a search.

-- OR --

1. Navigate to the search page by using the URL without being logged in
2. Attempt to make a search

Expected behavior
When a user attempts to perform a task that requires them to be logged in, they should be taken to a login page.

Screenshots

Additional Context
Server returns a 422 status code in this case.
Response: {"msg":"Signature verification failed"}

[mikeyavorsky]

Anirudh is investigating this issue.