NOT DONE [Auth FE] AASignedInUser I generate a JWT which contains my userId

[mattzcarey]

Description:
We need to secure our APIs. This means we will have to use jwt tokens at some point to authenticate them.

dependent on #178

Current plan is to use a jwt token from next-auth in combination with the database adapter to store users. The flow looks like this:

1. Use JWT with NextAuth:
   When a user logs in via NextAuth, generate a JWT that contains the user's unique identifier (like a user ID). This JWT should be signed using a secure secret key. This will need to be added to the next-auth config.

2. Securely Store Secret Key:
   Store the secret key used to sign the JWT securely with SST in the secret config.

3. Make Requests to API Gateway with JWT:
   When making requests to the API Gateway, include the JWT as an Authorization header, typically as a Bearer token.

eg. Authorization: Bearer <token>

Validation Steps:
When I sign in I am generated a jwt token which is stored in a cookie
Screenshot of this decoded token in the backend lambda getUser

Tech Steps:

• Update the next-auth to use jwt tokens.
• store the jwt secret using sst config
• update the callbacks to add the userid to the jwt
• update the useAxios hook to include the Authorization header as default.
• update the getUser and addUser lambda to use userId as the unique identifier

[SEBRATHEZEBRA]

[mattzcarey]

Back from validation. This ticket never created the jwt.