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Recommended: JavaScript SDK with React Hooks

For new React apps, we recommend the JavaScript SDK with React Hooks (@dynamic-labs-sdk/react-hooks) instead of the legacy React SDK documented here. The JS SDK comes with many benefits such as a much smaller bundle size and other optimizations. Use the React quickstart (JavaScript SDK) to get started.

Summary

This callback will be called when an authentication process fails. This can be either caused by an error or by the user cancelling the process.

Usage

Callback Argument Values

First argument method:
Second argument reason:
For details about ProviderEnum, see hereFor details about PhoneData, see here
Last modified on June 25, 2026