WebException.passkeyError constructor
A passkey-related operation (challenge request or credential exchange)
failed. error carries the underlying auth0-spa-js passkey error
code (for example passkey_register_error, passkey_not_supported).
details is merged first so that error stays authoritative even when
the map carries its own code entry.
Implementation
WebException.passkeyError(final String error, final String message,
[final Map<String, dynamic>? details])
: this(WebException._passkeyError, message,
{...details ?? {}, 'code': error});