Cancel-button-on-"Create-Visitor-Password"-modal-unnecessarily-triggers-visitor-passwords-API (#292)

… on pop

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## Description

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## Type of Change

<!--- Put an `x` in all the boxes that apply: -->

- [ ] ✨ New feature (non-breaking change which adds functionality)
- [x] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
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lib/pages/visitor_password/view/visitor_password_dialog.dart

@@ -102,7 +102,7 @@ class VisitorPasswordDialog extends StatelessWidget {
                       ],
                     ))
                 .then((v) {
-              Navigator.of(context).pop(true);
+              Navigator.of(context).pop(v);
             });
           } else if (state is FailedState) {
             visitorBloc.stateDialog(
@@ -476,7 +476,7 @@ class VisitorPasswordDialog extends StatelessWidget {
                   child: DefaultButton(
                     borderRadius: 8,
                     onPressed: () {
-                      Navigator.of(context).pop(true);
+                      Navigator.of(context).pop(null);
                     },
                     backgroundColor: Colors.white,
                     child: Text(
@@ -651,7 +651,7 @@ class VisitorPasswordDialog extends StatelessWidget {
                     child: DefaultButton(
                       borderRadius: 8,
                       onPressed: () {
-                        Navigator.of(context).pop();
+                        Navigator.of(context).pop(null);
                       },
                       backgroundColor: Colors.white,
                       child: Text(