alright, that's it

lib/ezcontainer_railway_web/controllers/session_controller.ex

@@ -2,6 +2,12 @@ defmodule EzcontainerRailwayWeb.SessionController do
   alias EzcontainerRailway.Railway
   use EzcontainerRailwayWeb, :controller
 
+  def logout(conn, _) do
+    conn
+    |> clear_session()
+    |> redirect(to: "/")
+  end
+
   def token(conn, %{"railway_token" => token}) do
     case get_projects(token) do
       resp when is_list(resp) ->