Return user meta value

Hi I have looked at you guidance at:

https://wp-oauth.com/docs/how-to/extending-endpoints/

$me_data = apply_filters(‘wo_me_resource_return’, $me_data, $token);

I need to return some of the additioal fields stored against the user in the user end point. I am able to add these field to the rest API suing below – kindly advise how ca i reflect this in the oauth end point being returned through json token.

register_meta( ‘user’, ‘meta_key_here’, [ ‘show_in_rest’ => true ] );

add_action( 'rest_api_init', 'adding_user_meta_rest' );
    function adding_user_meta_rest() {
       register_rest_field( 'user',
                            'collapsed_widgets',
                             array(
                               'get_callback'      => 'user_meta_callback',
                               'update_callback'   => null,
                               'schema'            => null,
                                )
                          );
    }
   function user_meta_callback( $user, $field_name, $request) {
       return get_user_meta( $user[ 'id' ], $field_name, true );
   }