User Interviews Panel... but concerned about financial data privacy?

I just got approved for a panel, but it's related to online banking, and they want me to login to my banking app as part of it. I hate to walk away from $125, but... I'm just super concerned about my privacy! How could I be sure they couldn't see my login info? Is anyone else doing this panel?? I trust User Interviews, but I'm just getting a bad gut feeling about this one.