how i get a server-ip other user has?

hello

i thought i want to use my friend's ip, and i ask him, he said "O.K.i am not using this server, so i am going to del my account. maybe you can get my ip next week!"

But i could not use the ip. what is the problem?

yes. in fact i waited for two weeks.

He seems to had logged in with a google account.

is this relevant?

he said as it.

probably his mistake. i will check again.

Surprisingly, i got the ip!

He said he had deleted his account, but actually he had deleted it a little later.

thanks to your help!