Options

Create AuthConfig explicitly, then pass it to both the store and auth builder.

use better_auth::AuthConfig;

fn auth_config(secret: &str) -> AuthConfig {
    AuthConfig::new(secret)
        .app_name("My application")
        .base_url("https://auth.example.com")
        .base_path("/api/auth")
        .trusted_origin("https://app.example.com")
}

Configuration	Purpose	Guide
`secret`, `managed_secrets`	Signing and encryption	Secrets
`base_url`, `base_path`	Public URL and auth mount	Installation
`trusted_origins`	Allowed request and redirect origins	Cookies
`session`	Expiry, refresh, cookies, storage	Sessions
`user`, `account`, `session.additional_fields`	Application data policies	Additional fields
`verification`	Verification credential storage	Secondary storage
`advanced.ip_address`	Trusted proxies and client identity	Rate limits
`background_tasks`	Observe background delivery	Notifications

Plugin options are configured on each plugin instance. Middleware options such as rate limiting are registered on AuthBuilder.

For every field and default, use the AuthConfig source.