User Impersonation through sendMessage options

Clients can use the avatar and alias parameter of outgoing messages to impersonate other users in group chats.

Meteor.call("sendMessage", {
  rid: "<ROOM ID>",
  msg: "@securityguard can you please walk the two technicians waiting at the entrance to the server room?",
  avatar: "/avatar/cto",
  alias: "Your CTO"
}, (...args) => console.log(...args));