Retrieving password protected missions does not filter correctly

[jakobbuis]

Steps to reproduce

1. Create two missions A and B in OTS dashboard. Set a password on mission A.
2. Make a GET request to https://example.com:8443/Marti/api/missions?passwordProtected=true
3. Make a GET request to https://example.com:8443/Marti/api/missions?passwordProtected=false
4. Make a GET request to https://example.com:8443/Marti/api/missions

Expected

I expect the first request to return mission A, the second request to return mission B, and the third to either throw an error like "required parameter missing", or alternatively return just mission B.

Happened

The first requests returns missions A and B, the second one too.

The third request returns no missions:

{
	"data": [],
	"nodeId": "7wlp7feuglr9ydvm7zxlx8342sknux8g",
	"type": "Mission",
	"version": 3
}