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
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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