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diff --git a/lib/pleroma/helpers/auth_helper.ex b/lib/pleroma/helpers/auth_helper.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.Helpers.AuthHelper do
+  alias Pleroma.Web.Plugs.OAuthScopesPlug
+  alias Plug.Conn
+
+  import Plug.Conn
+
+  @oauth_token_session_key :oauth_token
+
+  @doc """
+  Skips OAuth permissions (scopes) checks, assigns nil `:token`.
+  Intended to be used with explicit authentication and only when OAuth token cannot be determined.
+  """
+  def skip_oauth(conn) do
+    conn
+    |> assign(:token, nil)
+    |> OAuthScopesPlug.skip_plug()
+  end
+
+  @doc "Drops authentication info from connection"
+  def drop_auth_info(conn) do
+    # To simplify debugging, setting a private variable on `conn` if auth info is dropped
+    conn
+    |> assign(:user, nil)
+    |> assign(:token, nil)
+    |> put_private(:authentication_ignored, true)
+  end
+
+  @doc "Gets OAuth token string from session"
+  def get_session_token(%Conn{} = conn) do
+    get_session(conn, @oauth_token_session_key)
+  end
+
+  @doc "Updates OAuth token string in session"
+  def put_session_token(%Conn{} = conn, token) when is_binary(token) do
+    put_session(conn, @oauth_token_session_key, token)
+  end
+
+  @doc "Deletes OAuth token string from session"
+  def delete_session_token(%Conn{} = conn) do
+    delete_session(conn, @oauth_token_session_key)
+  end
+end