Hide the register prompt when signups are closed

app/templates/auth/login.html

@@ -38,10 +38,12 @@
                 
                 <hr class="my-4">
                 
+                {% if allow_registration %}
                 <p class="text-center text-muted mb-0">
                     Don't have an account? 
                     <a href="{{ url_for('auth.register') }}">Register here</a>
                 </p>
+                {% endif %}
             </div>
         </div>
     </div>