A modern approach to accessing systems is represented by passwordless authentication, which relies on a user's mobile device for security instead of traditional passwords. This method uses one-time-passcodes (OTP), SMS, Passkeys, Silent Network Authentication, Voice, or Email notification to authenticate users. Twilio Verify integrates with Go to provide a robust and reliable solution for implementing passwordless authentication. The process involves the user providing their phone number as a unique identifier, receiving an OTP via SMS, inputting the code into the application, and verifying it against the one generated by Twilio Verify. This approach enhances security while simplifying the login process and improving user convenience. By using Go with Twilio Verify, developers can create scalable and secure passwordless authentication systems.