fix routing

lib/routes.dart

@@ -1,3 +1,5 @@
+import 'package:doctor_app_flutter/screens/settings/settings_screen.dart';
+
 import './screens/QR_reader_screen.dart';
 import './screens/auth/login_screen.dart';
 import './screens/blood_bank_screen.dart';
@@ -18,6 +20,7 @@ const String PATIENTS = 'patients/patients';
 const String BLOOD_BANK = 'blood_bank';
 const String DOCTOR_REPLY = 'doctor_reply';
 const String MEDICINE_SEARCH='medicine_search';
+const String SETTINGS ='settings';
 
 
 
@@ -32,7 +35,9 @@ var routes = {
   QR_READER:(_)=>QrReaderScreen(),
   BLOOD_BANK:(_)=>BloodBankScreen(),
   DOCTOR_REPLY:(_)=>DoctorReplyScreen(),
-  MEDICINE_SEARCH:(_)=>MedicineSearchScreen()
+  MEDICINE_SEARCH:(_)=>MedicineSearchScreen(),
+  SETTINGS:(_)=>SettingsScreen()
+
 
 
 };

lib/screens/settings/settings_screen.dart

@@ -0,0 +1,9 @@
+import 'package:flutter/material.dart';
+class SettingsScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      
+    );
+  }
+}

lib/widgets/shared/app.drawer.dart

@@ -29,6 +29,9 @@ class AppDrawer extends StatelessWidget {
           ListTile(
             title: Text('Settings'),
             leading: Icon(Icons.settings),
+             onTap: () {
+              drawerNavigator(context, SETTINGS);
+            },
           ),
           Divider(),
           ListTile(