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diff --git a/lib/pleroma/web/plugs/ensure_authenticated_plug.ex b/lib/pleroma/web/plugs/ensure_authenticated_plug.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Plugs.EnsureAuthenticatedPlug do
+  @moduledoc """
+  Ensures _user_ authentication (app-bound user-unbound tokens are not accepted).
+  """
+
+  import Plug.Conn
+  import Pleroma.Web.TranslationHelpers
+
+  alias Pleroma.User
+
+  use Pleroma.Web, :plug
+
+  def init(options) do
+    options
+  end
+
+  @impl true
+  def perform(
+        %{
+          assigns: %{
+            auth_credentials: %{password: _},
+            user: %User{multi_factor_authentication_settings: %{enabled: true}}
+          }
+        } = conn,
+        _
+      ) do
+    conn
+    |> render_error(:forbidden, "Two-factor authentication enabled, you must use a access token.")
+    |> halt()
+  end
+
+  def perform(%{assigns: %{user: %User{}}} = conn, _) do
+    conn
+  end
+
+  def perform(conn, _) do
+    conn
+    |> render_error(:forbidden, "Invalid credentials.")
+    |> halt()
+  end
+end