To use this in GNU Radio, you need to register an account on this website, create a project to work from, and download your access key for our Cloud Assembly Service. In this tutorial, you'll find the directions to help you in that process.
First, create an account on this website
After creating an account, you should get a confirmation email. Follow the directions there to activate your account, then log in to your account and create a New Project.
Locate the "Add a new project" button.
Enter project creation information. Project name, target platform, and description.
The new project is created. You can now download your keyfile. This is your access key for using the Cloud Assembmly Service.
When you get around to component creation, you can click on the component dashboard and see a list of components currently available to you.