By default, every account has an empty Application called SampleApp which you can see directly from the Dashboard.
You can use this Application to register your devices.
Create a New Application
If you wish to add a new network, select the green button + Create New Application from the Dashboard.
Alternatively, go to the Applications tab in the left-side menu and click on the option +New Application.
Fill out the Application name and the desired device capacities but keep in mind that it must be a multiple of 10 and it's not allowed to exceed the overall account device capacity limit.
You can also select whether this Application shall be visible to other organization members (if applicable).
Finally, click on Add new application.
Once complete, you can select the new Application and the next step is Enroll a Device.