# FAST Mobile OTP Login The FAST Mobile OTP Login app provides an efficient way for customers to access your eCommerce store. By simply entering a one-time password (OTP) delivered to their registered mobile number, shoppers can securely log in. This feature offers enhanced security and authentication through the use of OTPs, which are sent directly to the user's mobile device. Furthermore, the app allows for customization of the OTP template and the appearance of the login widget to align with the overall theme of the store seamlessly. Moreover, the administrator can gain insights into OTP usage, including the total number of OTPs sent and the breakdown of verified and unverified OTPs. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://magecomp.gitbook.io/shopify/apps/fast-mobile-otp-login.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.