better-auth

TypeScript authentication with OAuth and sessions is enabled by configuring environment variables for secrets and provider credentials, then mounting the framework-agnostic API handler into your app to manage email/password, social OAuth, and session flows.

Framework-agnostic authentication works with Next.js, Nuxt, SvelteKit, and Express by mounting the API handler directly into your chosen framework, allowing TypeScript apps to manage secure sessions and OAuth across multiple platforms.

Passkeys and two-factor authentication can be implemented using a plugin ecosystem that extends TypeScript authentication, adding WebAuthn, magic links, organizations, rate limiting, and advanced session controls to your application.

Multi-tenant user management and account linking are handled through a framework-agnostic authentication solution offering built-in social OAuth token management, organization plugins, and email/password verification for TypeScript apps.

Database URLs and provider credentials for secure TypeScript auth are configured via environment variables, supplying the necessary secrets, database connections, and OAuth provider settings before mounting the API handler in your framework.

Environment variables for secrets are required when setting up email and password authentication to securely hash passwords, manage session tokens, and protect sensitive OAuth provider credentials across your TypeScript application infrastructure.