Add status feedback

aleksis/apps/paweljong/frontend/components/event/Checkpoint.vue

@@ -59,6 +59,7 @@
     statusObject.message = `Error checking in ${data.user.username}`;
     statusObject.color = "red";
 	})
+        alert(checkInStatus.message);
       },
       startScan() {
         try {
@@ -96,6 +97,7 @@
                 }).catch((error) => {
                   checkInStatus.message = "Error retrieving or decoding data";
                   checkInStatus.color = "red";
+                  alert(checkInStatus.message);
                 };
               }
             });