If you cannot remember the password of your D-link router, then you can reset the router to its default settings to resolve the issue. Follow the tips here carefully for D link DAP 1520 reset: • Keeping your router ON, press and hold the reset button available in a hole on the side of your router with a paperclip. • Hold the reset button of your D-link router for 10 seconds or until the LED light turns red. • Your router will now start rebooting. • Now, wait until 30 seconds and then visit http://dlinkap.local or htpp://192.168.50 to use your default login credentials for setting a new password. Read more https://connectrouter.com/d-link-dap-1520-setup/