fix the contactus api endpoint

TES/tes/apiendpoints.py

@@ -178,9 +178,10 @@ class TunnelstatEP(Resource):
 class ContactUs(Resource):
     def post(self):
         import tempfile
-        data = json.loads(request.args.get('data'))
+        print(request.get_json())
+        data = request.get_json()
         f = tempfile.NamedTemporaryFile(mode='w+b',dir=app.config['MESSAGES'],delete=False)
-        f.write(data)
+        f.write(json.dumps(data).encode())
         f.close()
         return