Dear All, Please Help me I seek a method to reset the password of a VG310 Gateway. On the site cisco I have found no Thanks

Dear All, on VG310, I wanted to create a password for the console line con 0, but I forgot to create a password and a user name.I typed "wr" to save. now it asks for a username and password that I not know. I tested this error on the PACKET TRACER s...