adds event_count for user in the dashboard

tournaments/templates/admin/tournaments/dashboard.html

@@ -188,6 +188,7 @@
                             <th style="padding: 8px 12px; text-align: left;">Date Joined</th>
                             <th style="padding: 8px 12px; text-align: left;">Email</th>
                             <th style="padding: 8px 12px; text-align: left;">Phone</th>
+                            <th style="padding: 8px 12px; text-align: left;">Events</th>
                         </tr>
                     </thead>
                     <tbody>
@@ -209,6 +210,7 @@
                             <td style="padding: 8px 12px;">{{ user.date_joined|date:"M d, Y H:i" }}</td>
                             <td style="padding: 8px 12px;"><a href="mailto:{{ user.email }}">{{ user.email }}</a></td>
                             <td style="padding: 8px 12px;">{{ user.phone }}</td>
+                            <td style="padding: 8px 12px;">{{ user.event_count }}</td>
                         </tr>
                         {% empty %}
                         <tr>