Inital project setup

OpenArchival.Blazor/Components/Account/Pages/Manage/Disable2fa.razor

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+@page "/Account/Manage/Disable2fa"
+
+@using Microsoft.AspNetCore.Identity
+@using OpenArchival.Blazor.Data
+
+@inject UserManager<ApplicationUser> UserManager
+@inject IdentityUserAccessor UserAccessor
+@inject IdentityRedirectManager RedirectManager
+@inject ILogger<Disable2fa> Logger
+
+<PageTitle>Disable two-factor authentication (2FA)</PageTitle>
+
+<StatusMessage />
+<h3>Disable two-factor authentication (2FA)</h3>
+
+<div class="alert alert-warning" role="alert">
+    <p>
+        <strong>This action only disables 2FA.</strong>
+    </p>
+    <p>
+        Disabling 2FA does not change the keys used in authenticator apps. If you wish to change the key
+        used in an authenticator app you should <a href="Account/Manage/ResetAuthenticator">reset your authenticator keys.</a>
+    </p>
+</div>
+
+<div>
+    <form @formname="disable-2fa" @onsubmit="OnSubmitAsync" method="post">
+        <AntiforgeryToken />
+        <button class="btn btn-danger" type="submit">Disable 2FA</button>
+    </form>
+</div>
+
+@code {
+    private ApplicationUser user = default!;
+
+    [CascadingParameter]
+    private HttpContext HttpContext { get; set; } = default!;
+
+    protected override async Task OnInitializedAsync()
+    {
+        user = await UserAccessor.GetRequiredUserAsync(HttpContext);
+
+        if (HttpMethods.IsGet(HttpContext.Request.Method) && !await UserManager.GetTwoFactorEnabledAsync(user))
+        {
+            throw new InvalidOperationException("Cannot disable 2FA for user as it's not currently enabled.");
+        }
+    }
+
+    private async Task OnSubmitAsync()
+    {
+        var disable2faResult = await UserManager.SetTwoFactorEnabledAsync(user, false);
+        if (!disable2faResult.Succeeded)
+        {
+            throw new InvalidOperationException("Unexpected error occurred disabling 2FA.");
+        }
+
+        var userId = await UserManager.GetUserIdAsync(user);
+        Logger.LogInformation("User with ID '{UserId}' has disabled 2fa.", userId);
+        RedirectManager.RedirectToWithStatus(
+            "Account/Manage/TwoFactorAuthentication",
+            "2fa has been disabled. You can reenable 2fa when you setup an authenticator app",
+            HttpContext);
+    }
+}