Go to citidel over tarsis. Take sides with the Ithorian and when
Czerka fights them go to the Ithorian in the rare flower place and
he will ask you to help them. Tell him he is on his own and you
will receive dark side points. You can keep talking to him and
tell him this until you get the desired amount of darkside points.
Once your done getting enough points, tell him your going to help
him and he will give you the keycard.