instagram help

[Exemplifying]

Hi, so I am trying to steal someones instagram account by using the tactic where you go on people's profiles who have there Email visible and look if its already created, this persons isn't and I created the email, however when I try to reset his password it says, Sorry, we can not send you a login link, contact Instagram support' or something like that, it is the right email as I tried typing in the email first and then the username but it didn't send a link to any email, do you know why this is?