Accessing helper gives error Cannot read property 'formatWelcomeMessage' of undefined

**Sails version**: 1.1.0
**Node version**: 10.15.0
**NPM version**: 6.4.1
**DB adapter name**: N/A
**DB adapter version**: N/A
**Operating system**: Windows 7

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I was testing out helpers in my sails application and created a helper api/helpers/format-welcome-message.js with the exact code as in the [documentation](https://sailsjs.com/documentation/concepts/helpers). When I try to access the helper from my controller, I get an error "TypeError: Cannot read property 'formatWelcomeMessage' of undefined" when trying to invoke the helper from my controller. Given below is the controller code:

`try {
var greeting = await sails.helpers.formatWelcomeMessage('Bubba');
console.log(greeting);
} catch (error) {
console.log(error);
}

`

Start with the helpers documentation and the reported file api/helpers/format-welcome-message.js, then compare its documented usage with the controller code that calls sails.helpers.formatWelcomeMessage('Bubba'). Reproduce the TypeError in the Sails 1.1.0 and Node 10.15.0 environment; done means the helper can be invoked from the controller without sails.helpers being undefined.

Written by the indexing model from the issue text.