Add a route to kill tunnel if open with same JWT token

lib/ClientManager.js

@@ -30,7 +30,7 @@ class ClientManager {
     // create a new tunnel with `id`
     // if the id is already used, a random id is assigned
     // if the tunnel could not be created, throws an error
-    async newClient(id) {
+    async newClient(id, securityToken) {
         const clients = this.clients;
         const stats = this.stats;
 
@@ -49,6 +49,7 @@ class ClientManager {
         const client = new Client({
             id,
             agent,
+            securityToken
         });
 
         // add to clients map immediately