The process of proving you are the account owner during a normal sign-in attempt (such as 2FA or email links).
Here is a story about the digital "gatekeepers" of the modern era, centered around that high-stakes moment of verification. The Last Gate of Elias Thorne Elias Thorne thisvid sign in verified
If you're looking to create helpful content around ThisVid sign-in verification: The process of proving you are the account