D-Link Wireless AC1200 User Manual page 21

Section 3 - Configuration
If you would like to use the mydlink services (the mydlink portal at
mydlink.com or the mydlink Lite app), you must have an account. Click
Yes if you already have a mydlink account, or No if you would like to
create one.
Click Next to continue.
Note: If you do not want to register at this time, you may click Skip and proceed
to the instructions on the next page.
If you selected Yes, I have a mydlink account, enter your mydlink
Account Name (your e-mail address) and Password.
Click Next to register your router with your mydlink account.
D-Link DIR-850L User Manual 16