authentication token for Chat
webix.ui({
view: "chat",
token: "common.token.example",
url: "https://docs.webix.com/chat-backend/"
});
Note that token is an optional property used by the built-in Backend service to pass it to the server. If you develop your own way of the user authentication you may not need this property. However if you use the built-in backend a token should be passed to Chat App or Chat widget after the user has successfully logged in.