I'm still searching for the username, but I've taken a considerably focused look at the note and several other pieces of information. Then I decided
that the note itself was supposed to tell someone else the login info, and the info was hidden in it. So I read it as blaitantly as possible looking
for a line that would reveal a username or password.
For now it is need-to-know...
That line really stuck out at me. I think Cerebrus's comment on 5's "cleverness" was supposed to distract us into reading between the lines, when
I actually think the info was ON the lines, right in front of us.
I feel very strongly that either the username or password (more likely the password) is "need-to-know".
I'll continue searching for other info. But the wording on that one was just too odd to ignore.