Higher API security by default and improve logs

[oudeismetis]

What this does

API endpoints should require user login by default. If an endpoint is allowed to be opened to all, then it should be explicitly opened up.

Checklist

• [x] Require user auth by default for all API endpoints
• [x] Prevent duplicate logs
• [x] Handle logging JSON objects better

How to test

Add user steps to achieve desired functionality for this feature.