Hi, so in fn.users.php I saw a function named fn_user_send_otp, and from what I can see it generates an otp password and then sends it to the email of the user who called that function.
But I can't seem to find where it's used, is there some sort of setting I have to enable in the Admin panel? Is it used for registration? Which controller files use this function?
It is a part of new functionality - login by one time password on checkout if entered email exists in the database
Ah I see, this is specifically used ONLY in login at checkout?
Ah I see, this is specifically used ONLY in login at checkout?
In the current version yes. Possibly this functionality will be extended later
Hmmmm, I activated the Customer Sign in block at the Layouts page of Checkout in the admin panel but I can't seem to see the actual option when I go to the Storefront.
When I click the button at Checkout, this is the popup I see. 
https://pasteboard.co/JevFYf5.jpg
Specify e-mail which exists in the database and place order. You will see
https://prnt.sc/t5fotc