fix: enable users without passwords to delete their accounts by using uia request in account deletion

lib/pages/settings_security/settings_security.dart

@@ -74,31 +74,22 @@ class SettingsSecurityController extends State<SettingsSecurity> {
     if (mxid == null || mxid.isEmpty || mxid != supposedMxid) {
       return;
     }
-    final input = await showTextInputDialog(
+    final resp = await showFutureLoadingDialog(
-      useRootNavigator: false,
       context: context,
-      title: L10n.of(context).pleaseEnterYourPassword,
+      delay: false,
-      okLabel: L10n.of(context).ok,
+      future: () =>
-      cancelLabel: L10n.of(context).cancel,
+          Matrix.of(context).client.uiaRequestBackground<IdServerUnbindResult?>(
-      isDestructive: true,
+            (auth) => Matrix.of(context).client.deactivateAccount(auth: auth),
-      obscureText: true,
+          ),
-      hintText: '******',
-      minLines: 1,
-      maxLines: 1,
     );
-    if (input == null) return;
+
+    if (!resp.isError) {
       await showFutureLoadingDialog(
         context: context,
-      future: () => Matrix.of(context).client.deactivateAccount(
+        future: () => Matrix.of(context).client.logout(),
-        auth: AuthenticationPassword(
-          password: input,
-          identifier: AuthenticationUserIdentifier(
-            user: Matrix.of(context).client.userID!,
-          ),
-        ),
-      ),
       );
     }
+  }
 
   Future<void> dehydrateAction() => Matrix.of(context).dehydrateAction(context);