Designing SMS Login Flows for Roaming Users

<p>Short answer: use an emailed, single-use reset link as the default for most SaaS login recovery, and add SMS OTP only where users may genuinely lack email access or the product

<p>Most Playwright suites stop right before the hard part of a signup flow: the "confirm your email" link, the emailed 6-digit code, the password-reset mail. The usual reasons are

<h2> TL;DR </h2> <p>Short answer: a polling-based SMS provider is enough for a basic Node.js OTP login, provided the auth service owns the polling schedule, retry limits, resend

<h3> Most authentication systems don’t fail because developers can’t implement login. They fail because production security is very different from tutorial security. </h3>

<p>Email verification failures are hard to investigate. A user says the message never arrived, support sees a failed attempt, and an engineer opens logs full of addresses,