Unable to Log in into my old Google Account after factory reset.

In my Samsung android mobile, after factory reset, i am not able to log in into my Google account and the mobile shows "no username exists" .I cant login with my previous account but mobile login with other new account..what should i do to get into old Google account?

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hi frds it very long time too take in to account
#some times the aaccount will gets strucks because not in the use of google account of the system
#where as in case of the network updates ypu can move over this

hello guest
after factory reset all the old uername and
possword get deleted from devices
if you want to login again than use these steps
1 goto google account
2 enter you mailid and password
3 click in option of login
4 it will ask you to save passwork
5 click ok
your problem will be solved
good bye