Merge branch 'TMSS-2904-Authentication_state' into 'master'

use GET for  query_params and have code the same as Release 100

See merge request !1298

SAS/TMSS/backend/src/tmss/tmssapp/views.py

@@ -67,10 +67,10 @@ def revoke_token_deauth(request, *args, **kwargs):
     invalidate_token.delete()
     return HttpResponse(status=204)
 
-@api_view(['GET'])
+
 def authentication_state(request):
     if not request.user.is_authenticated:
-        username = request.query_params.get('username', None)
+        username = request.GET.get('username', None)
         if username:
             # Check websocket token against known token for given username, to hint to the frontend that the user has
             # an active session. Proposed solution from TMSS-2904.