Before connecting your device to The Things Stack you need to set up the LoRa Cloud portal by creating an API token.
LoRa Cloud Portal Setup
On the LoRa Cloud portal, navigate to Modem & Geolocation Services.
Choose Manage tokens on the left hand menu. Click the Create new token button.
Give the name to your token and tick the boxes next to permissions you wish to allow for it. Click the Create new token button to finish. A user can decide to restrict some permissions. On the image below, all permissions are allowed for the sake of simplicity of this guide.
To add a new device, choose Manage devices on the left hand menu and click the Add devices button. You only need to provide the device EUI as shown on the image below.