meteor__coursera-meteor-2/shared/methods.js

Meteor.methods({
  "chats.insert": function (chat) {
    check(chat, {
      user1Id: String,
      user2Id: String
    });
    chat.messages = [];
    const chatId = Chats.insert(chat);
    Meteor._debug("chats.insert", chat, chatId);
    return chatId;
  }
});