How do i recover username and password for my asus router?

In order to recover your username and password you need to reset you router , there is no other way :

For reset your router , you need to press the reset button on router for at least 30 second and make sure your router is directly plugged in with wall socket .

Once you done that , please come back to your computer and connect your computer with Asus network on wife once again and then open any browser and type 192.168.1.1 on the top of the address bar and hit enter . You need to complete the setting again and then you good to go. This time please remember  your username and password .

First you need to login with the asus router with the help of the Ip address

https:// 192.168.1.1

and then you can go to login page and from their you can recover a new password.