UIT Metro Universal Auth Library

A corporate authentication library (v1.1.17) for Metro (METRO/MAKRO) loyalty card applications. It provides a pre-built UI flow for phone number entry, SMS code verification, card selection, registration, and manual card linking. The library requires a recaptcha v3 key and an authorization token. It is proprietary (Russian-language docs only) and intended solely for internal Metro use. No release cadence documented; single-version package with limited community adoption. Differentiators: bundled CSS and callbacks for each step, but dependency on Metro-specific APIs and lack of ESM/TypeScript support (no typings) make it unsuitable for general use.