The Sky Team lounge (KE Lounge) is no help. I asked, they said "No soup for you" :-)

The OP will need to go to the gate.

OP, make certain you go to the gate fairly early to get properly checked in, Do not wait around to T-30 or any such nonsense, You can always go to the gate and then back to wherever you want to hang out.

EDIT: It does not hurt to do the "on line check-in", but DO NOT TRUST THIS ALONE. Get the old fashion hard stock BP. If you are really lucky and AA prints a real BP for you, that is nice. Still I would go to the gate,

EDIT 2: OP, to be clear, take the new connector to Bradly so you do not exit security. Even if for some reason the gate blows you off you could walk to the groundside ticket windows w.o much loss of time.