[FEAT] Test authorization for every route

[stijndcl]

Every route should be tested four to five times:

• Admin
• Coach (in this edition, if applicable)
• Coach but not in this edition (not applicable to all of the routes, not all of them are linked to editions)
• Invalid token
• No authorization at all

[stijndcl]

This would literally take weeks to test as we need hundreds upon hundreds of extra tests. The dependencies work for the routes where they've been tested, I don't want to waste precious development time on this right now. Might write some more of I have time in the end, but for now I'm putting it on the backburner.