Improve user persistance and 401 handling

[mango23322]

on login:

• check if token exists (if not, route to login)
• check if token is valid (if not, refresh token)
• try to get "my user info" using token (this will return a 403 if it is invalid, if this happens, follow the standard path for 403 errors).
• If get my user info is successful, route to Home page.

standard flow for 403 errors:

• make api call, token fails, 403 error handling is called
• check if token is valid, if not, log out user
• refresh token, if this fails, log out user
• re-attempt api call, if this fails, log out user