Function create_passthrough_auth_provider 

pub fn create_passthrough_auth_provider(
    cfg: &AuthConfig,
    incoming_token: Option<String>,
) -> Result<Arc<dyn HttpAuthProvider>, HttpConnectorError>

Build an auth provider, capturing an incoming_token for the AuthConfig::OAuthPassthrough per-request path (H1).

For passthrough configs the captured token is stored and forwarded by OAuthPassthroughAuth::apply (preferring a per-request inbound_token when one is also passed to apply). For all other configs this delegates to create_auth_provider.

Errors

Propagates any error from create_auth_provider for non-passthrough configs.