tencent cloud

chat.createTextAtMessage(options);

let message = chat.createTextAtMessage({
  to: 'group1',
  conversationType: TencentCloudChat.TYPES.CONV_GROUP,
  payload: {
    text: '@denny @lucy Dinner gathering tonight, reply with 1 if you are coming.',
    atUserList: ['denny', 'lucy', TencentCloudChat.TYPES.MSG_AT_ALL] // 'denny' 'lucy' are both userID
  },
  // cloudCustomData: 'your cloud custom data'
});

let promise = chat.sendMessage(message);
promise.then(function(imResponse) {
  console.log(imResponse);
}).catch(function(imError) {
  console.warn('sendMessage error:', imError);
});