Here is an example of a confirmation email that you can send to a user when they log in with passwordless authentication:
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`Subject: Passwordless Login Confirmation Dear [User], We wanted to let you know that you have successfully logged in to your account using passwordless authentication. If you did not initiate this login, please contact us immediately so that we can secure your account. Thank you for using our service. Sincerely, [Your Name]`
This email confirms that the user has successfully logged in to their account using passwordless authentication, and provides a reminder to contact the company if they did not initiate the login.
I hope this helps! Let me know if you have any questions.
