Merge pull request 'require-user-for-logentry' (#450) from require-user-for-logentry into staging

Reviewed-on: #450

src/tera/log.rs

@@ -250,7 +250,13 @@ async fn create_kiosk(
     } else if let Some(shipmaster) = data.shipmaster {
         User::find_by_id(db, shipmaster as i32).await.unwrap()
     } else {
-        User::find_by_id(db, data.rowers[0] as i32).await.unwrap()
+        let Some(rower) = data.rowers.get(0) else {
+            return Flash::error(
+                Redirect::to("/log"),
+                "Ausfahrt ohne Benutzer kann nicht angelegt werden.",
+            );
+        };
+        User::find_by_id(db, *rower as i32).await.unwrap()
     };
     Log::create(
         db,