docs: updated step 9 with new Mongo async API

tutorial/simple-todos/09-publications.md

@@ -137,44 +137,44 @@ Only the owner of a task should be able to change certain things. You should cha
 `imports/api/tasksMethods.js`
 
 ```js
-..
- 'tasks.remove'(taskId) {
- check(taskId, String);
-
- if (!this.userId) {
- throw new Meteor.Error('Not authorized.');
- }
-
- const task = TasksCollection.findOne({ _id: taskId, userId: this.userId });
-
- if (!task) {
- throw new Meteor.Error('Access denied.');
- }
-
- TasksCollection.remove(taskId);
- },
-
- 'tasks.setIsChecked'(taskId, isChecked) {
- check(taskId, String);
- check(isChecked, Boolean);
-
- if (!this.userId) {
- throw new Meteor.Error('Not authorized.');
- }
-
- const task = TasksCollection.findOne({ _id: taskId, userId: this.userId });
-
- if (!task) {
- throw new Meteor.Error('Access denied.');
- }
-
- TasksCollection.update(taskId, {
- $set: {
- isChecked,
- },
- });
- },
-..
+...
+  async 'tasks.remove'(taskId) {
+  check(taskId, String);
+ 
+  if (!this.userId) {
+  throw new Meteor.Error('Not authorized.');
+  }
+ 
+  const task = await TasksCollection.findOneAsync({ _id: taskId, userId: this.userId });
+ 
+  if (!task) {
+  throw new Meteor.Error('Access denied.');
+  }
+ 
+  await TasksCollection.removeAsync(taskId);
+  },
+
+  async 'tasks.setIsChecked'(taskId, isChecked) {
+  check(taskId, String);
+  check(isChecked, Boolean);
+ 
+  if (!this.userId) {
+  throw new Meteor.Error('Not authorized.');
+  }
+ 
+  const task = await TasksCollection.findOneAsync({ _id: taskId, userId: this.userId });
+ 
+  if (!task) {
+  throw new Meteor.Error('Access denied.');
+  }
+ 
+  await TasksCollection.updateAsync(taskId, {
+  $set: {
+  isChecked,
+  },
+  });
+  },
+...
 ```
 
 Why is this important if we are not returning tasks from other users in the client?