Expo Auth Session

Expo Auth Session is a foundational module within the Expo ecosystem for implementing web browser-based authentication flows, such as OAuth 2.0 and OpenID Connect, across Android, iOS, and web platforms. It provides a unified API to manage the complexities of these authentication methods, leveraging `expo-web-browser` for browser interaction and `expo-crypto` for secure operations like Proof Key for Code Exchange (PKCE), which is now the recommended grant type over implicit flow due to enhanced security. The current stable version is 55.0.15, with releases typically synchronized with major Expo SDK updates, occurring approximately three times per year. Key differentiators include its seamless integration with Expo development builds and managed workflow capabilities, simplifying the setup of deep linking and redirect URIs across various environments, and providing hooks like `useAuthRequest` for easy React component integration.