Allow deleting purchases

games/templates/add_purchase.html

@@ -22,6 +22,14 @@
                            value="Submit & Create Session" />
                 </td>
             </tr>
+            {% if purchase_id %}
+            <tr>
+                <td></td>
+                <td>
+                    <a href="{% url 'delete_purchase' purchase_id %}" class="text-red-600" onclick="return confirm('Are you sure you want to delete this purchase?');">Delete</a>
+                </td>
+            </tr>
+            {% endif %}
         </table>
     </form>
 {% endblock content %}