D-Link DIR-860L User Manual page 21

Section 2 - Installation
To use the mydlink service (mydlink.com or the mydlink Lite app), you
must have an account. Select if you do have a mydlink account or if you
need to create one. Click Next to continue.
If you do not want to register at this time, click Cancel.
If you selected Yes, enter your mydlink account name (email address)
and password. Click Login to register your router.
If you selected No, fill out the requested information and click Next to
create your mydlink account.
D-Link DIR-860L User Manual 17