implement admin panel

app/templates/admin.html

@@ -30,12 +30,13 @@
 				</form></td>
 				<td><form method="POST" action="/update-user">
 					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
-					<input type="checkbox" name="is_admin" value="true" {% if user["is_admin"] %}checked{% endif %} />
-					<button type="submit">update admin</button>
+					<input type="hidden" name="is_admin" value="{% if user["is_admin"] %}false{% else %}true{% endif %}" />
+					<input type="checkbox" disabled {% if user["is_admin"] %}checked{% endif %} />
+					<button type="submit">toggle admin</button>
 				</form></td>
 				<td><form method="POST" action="/update-user">
 					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
-					<input type="email" name="email" placeholder="email" />
+					<input type="email" name="email" placeholder="email" value="{{ user["email"] }}"/>
 					<button type="submit">update email</button>
 				</form></td>
 				<td><form method="POST" action="/delete-user">