Fix SupplyParameterFromForm usages (#1353)

apps/server/AliasVault.Admin/Auth/Pages/Login.razor

@@ -75,6 +75,11 @@ else
 
     private bool IsAdminConfigured { get; set; } = true;
 
+    protected override void OnInitialized()
+    {
+        Input ??= new();
+    }
+
     /// <inheritdoc />
     protected override async Task OnInitializedAsync()
     {

apps/server/AliasVault.Admin/Auth/Pages/LoginWith2fa.razor

@@ -52,6 +52,7 @@
     /// <inheritdoc />
     protected override async Task OnInitializedAsync()
     {
+        Input ??= new();
         await base.OnInitializedAsync();
 
         // Ensure the user has gone through the username & password screen first

apps/server/AliasVault.Admin/Auth/Pages/LoginWithRecoveryCode.razor

@@ -36,6 +36,7 @@
     /// <inheritdoc />
     protected override async Task OnInitializedAsync()
     {
+        Input ??= new();
         // Ensure the user has gone through the username & password screen first
         user = await SignInManager.GetTwoFactorAuthenticationUserAsync() ??
                throw new InvalidOperationException("Unable to load two-factor authentication user.");

apps/server/AliasVault.Admin/Main/Pages/Account/Manage/ChangePassword.razor

@@ -38,6 +38,11 @@
 
     [SupplyParameterFromForm] private InputModel Input { get; set; } = default!;
 
+    protected override void OnInitialized()
+    {
+        Input ??= new();
+    }
+
     private async Task OnValidSubmitAsync()
     {
         var user = await UserManager.FindByIdAsync(UserService.User().Id);

apps/server/AliasVault.Admin/Main/Pages/Account/Manage/EnableAuthenticator.razor

@@ -79,6 +79,11 @@ else
 
     [SupplyParameterFromForm] private InputModel Input { get; set; } = default!;
 
+    protected override void OnInitialized()
+    {
+        Input ??= new();
+    }
+
     /// <inheritdoc/>
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {