@User I have released a new version of our SDKs to give you the feature you requested: - supertokens-auth-react: v0.9.1 - supertokens-node: v4.3.2 You can safely upgrade to the above without any breaking changes. To send a custom error message that displays on the frontend, you can throw the following error from your signinup API:

throw new STError(
        {
            type: "FIELD_ERROR",
            message: "Some custom message"
        },
        recipeInstance
    );

This will show "Some custom message" on the signup screen when the user tries to login using a social provider.