Implement Authorization

nats-server/config/server.conf

@@ -0,0 +1,19 @@
+authorization {
+  default_permissions = {
+    subscribe = "telestion.chat"
+    publish: { deny: ">" }
+  }
+  ADMIN = {
+    publish = ">"
+    subscribe = ">"
+  }
+  CHAT_CLIENT = {
+    publish = "telestion.chat"
+    subscribe = "telestion.chat"
+  }
+  users = [
+    {user: admin,   password: admin, permissions: $ADMIN}
+    {user: client,  password: client, permissions: $CHAT_CLIENT}
+    {user: guest, password: guest}
+  ]
+}