fixed small typo in route

StationSoftware/routes/metadata/metadata.js

@@ -35,14 +35,14 @@ router.post('/stationIdentifier', async function (req, res) {
     console.log("Station Identifier to set:" + stationIdentifier)
     axios.post(host + "/configuration", JSON.stringify({ stationIdentifier })).then(respond => {
         if (respond.statusCode === 200) {
-            req.flash('success_msg', 'Station Identifier updated!')
-            req.redirect('/dashboard/metadata')
+            res.flash('success_msg', 'Station Identifier updated!')
+            res.redirect('/dashboard/metadata')
         } else {
-            req.flash('ERROR')
-            req.redirect('/dashboard/metadata')
+            res.flash('ERROR')
+            res.redirect('/dashboard/metadata')
         }
     }).catch(err => {
-        req.flash('ERROR');
+        res.flash('ERROR');
         console.log("Error while setting stationIdentifier:" + String(err))         
     })
 })