Improve the sign-in process

[avenmia]

The current sign-in/create account implementation uses NextAuth's email provider to send magic links to user's email that they can use to log in. If there is an existing account it retrieves the user's data from the database, otherwise it creates a new account.

One pain point for users was that they couldn't remember their email passwords. They would be signed in to their email on their phone, but since they were using the workshop's computer, they wouldn't be able to use the magic link.

The goal of this issue is to come up with an alterative way for people to sign-in/create an account so that they don't need to remember their email passwords.

Notes:

• I think it's best the solution doesn't end up storing user's passwords
• An idea I had was that we could maybe display the sign-in link in the email and have it pass through a URL shortener so that they could type it into their browser

References:

• https://next-auth.js.org/