I'ts not clear what you are asking about, mean, the context of your question. If you are trying to install and configurate a router, "Username alerady in use" looks rather strange to me. I've installed several routers to relatives and friends and never encounered this "reply". Should be this the case, restart instaling procedure by pressing reset button. Also might help to give you best answer if you should specify make and model of your router.
Answers & Comments
I'ts not clear what you are asking about, mean, the context of your question. If you are trying to install and configurate a router, "Username alerady in use" looks rather strange to me. I've installed several routers to relatives and friends and never encounered this "reply".
Should be this the case, restart instaling procedure by pressing reset button.
Also might help to give you best answer if you should specify make and model of your router.