Designing a Multi‑Account Unified Login System: From Phone Number Authentication to Third‑Party Integration
This article explains how to design a scalable multi‑account login system, covering self‑built phone‑number authentication, optimized password‑less flows, third‑party integrations such as Weibo and WeChat, a refactored user‑basic and authorization schema, and the steps for implementing one‑click carrier‑based login.