message errors when food or customer name exists

GrabGrub/Kiosk/templates/Kiosk/update_customer.html

@@ -24,4 +24,7 @@
 </div>
 <br>
 <a href="{% url 'view_customer_details' customer.pk %}"><button class="btn btn-secondary">Back</button></a>
+{% if message %}
+<p class="mt-3 alert alert-danger" style="width: 75%"> {{message}}</p>
+{% endif %}
 {% endblock %}

GrabGrub/Kiosk/templates/Kiosk/update_food.html

@@ -30,4 +30,7 @@
 </div>
 <br>
 <a href="{% url 'view_food_details' food.pk %}"><button class="btn btn-secondary">Back</button></a>
+{% if message %}
+<p class="mt-3 alert alert-danger" style="width: 75%"> {{message}}</p>
+{% endif %}
 {% endblock %}