I received no such email from USAA (and, yes, I do have an account). I know nothing about this app but, on the possibility that your email was a phishing email or spam, I would contact USAA directly (via phone or a known bookmark) and inquire.
Jon, my apologies for not promptly getting back with you. A bit red-faced am I.
Yes, I did call USAA and they did affirm that the email I received was from them.
