add signin function

lib/pages/invoice/invoce_list.dart

@@ -3,7 +3,7 @@ import 'package:fcs/model/main_model.dart';
 import 'package:fcs/model/shipment_model.dart';
 import 'package:fcs/model_fcs/package_model.dart';
 import 'package:fcs/pages_fcs/package_list_row.dart';
-import 'package:fcs/theme/theme.dart';
+import 'package:fcs/fcs/common/theme.dart';
 import 'package:fcs/widget/bottom_up_page_route.dart';
 import 'package:fcs/widget/local_text.dart';
 import 'package:provider/provider.dart';
@@ -39,7 +39,7 @@ class _InvoiceListState extends State<InvoiceList> {
 
   @override
   Widget build(BuildContext context) {
-        var owner = Provider.of<MainModel>(context).isOwner();
+    var owner = Provider.of<MainModel>(context).isOwner();
 
     return LocalProgress(
       inAsyncCall: _isLoading,
@@ -73,16 +73,19 @@ class _InvoiceListState extends State<InvoiceList> {
                 ],
               ),
             ),
-            floatingActionButton:owner? FloatingActionButton.extended(
-              onPressed: () {
-                _newInvoice();
-              },
-              icon: Icon(Icons.add),
-              label: Text(AppTranslations.of(context).text("invoices.add")),
-              backgroundColor: primaryColor,
-            ):null,
+            floatingActionButton: owner
+                ? FloatingActionButton.extended(
+                    onPressed: () {
+                      _newInvoice();
+                    },
+                    icon: Icon(Icons.add),
+                    label:
+                        Text(AppTranslations.of(context).text("invoices.add")),
+                    backgroundColor: primaryColor,
+                  )
+                : null,
             body: TabBarView(
-              children: [ _pending(), _paided()],
+              children: [_pending(), _paided()],
             )),
       ),
     );