Register your ATKey in YubiOn Portal.
Click on “ATKey management” in the menu on the left side of the screen.
Click the “Add ATKey” button in the upper right corner of the ATKey list.
Insert the ATKey into the USB port and click on the ATKey input field.
Touch the ATKey fingerprint sensor.
Enter the ATKey name and click the “Register” button.
Click the “OK” button in the confirmation message.
That’s all for ATKey registration.