Use POST method for logout

Author: np5

server/templates/user_menu.html

@@ -76,7 +76,7 @@
             {% endif %}
             <li><a class="dropdown-item" href="{% url 'accounts:tasks' %}">Tasks</a></li>
             <li role="separator" class="dropdown-divider"></li>
-            <li><form id="logout-form" action="{% url 'logout' %}">{% csrf_token %}<button type="submit" class="dropdown-item">Sign Out</button></form></li>
+            <li><form id="logout-form" action="{% url 'logout' %}" method="POST">{% csrf_token %}<button type="submit" class="dropdown-item">Sign Out</button></form></li>
         </ul>
     </li>
     {% endif %}