ReferenceError: check is not defined

Meteor version: v1.3

I was following the tutorial on the meter website found here:

https://www.meteor.com/tutorials/blaze/security-with-methods

In the tutorial they recommend checking user input using a command as follows:

check(text, String);

However, when I go to run the application, I got the error message:

Exception while invoking method 'tasks.remove' ReferenceError: check is not defined

 No where in the tutorial did it mention that you had to add the 'check' package. So running the following command solved the problem:

meteor add check