Login / signup screen

[gammons]

We'll need to think about:

• SSO with Github + google
• Storing the user info
• Storing todolists locally on phone

On the web view, the login workflow looks like this:

1. Upon successful SSO, the backend will redirect the user to the auth page. The backend will provide a token param, which is a valid JWT that the frontend can use to make further calls.
2. The auth page makes a call to the user endpoint to get information about the currently logged in user, and stores it inUserStorage.
3. The page then redirects to the loading page, which makes a call to the todolists endpoint, which retrieves all todolists owned by the user. These lists are stored via TodoListStorage.
4. The user is finally redirected to /todolist which will show the most recently used (or first) todo list.