change addpatient widget to accept signedin user and arg

Frontend/patient_manager/lib/components/addOrViewPatient.dart

@@ -58,7 +58,7 @@ class _AddOrViewPatientState extends State<AddOrViewPatient> {
             return PatientView(selectedPatient: snapshot.data!);
           }
         }
-        return AddPatient(userEmail: widget.signedInUser.email);
+        return AddPatient(signedInUser: widget.signedInUser);
       },
     );
   }

Frontend/patient_manager/lib/router/routeGenerator.dart

@@ -45,10 +45,10 @@ class RouteGenerator {
         return _errorRoute();
 
       case '/patient-manager/add':
-        if (args is String) {
+        if (args is AppUser) {
           return MaterialPageRoute(
             builder: (_) => AddPatient(
-              userEmail: args,
+              signedInUser: args,
             ),
           );
         }