myCRED Transfer by Display Name

//Add custom transfer fields for giving credits to creators
function mycred_pro_custom_transfer_compl( $options ) {

    $options['display_name'] = 'Display Name';
    return $options;

}
add_filter( 'mycred_transfer_autofill_by', 'mycred_pro_custom_transfer_compl' );

// Take over the autocomplete process
function mycred_pro_custom_autocomplete( $transfer_settings, $mycred ) {

    $results = array();
    $user_id = get_current_user_id();
    $string  = sanitize_text_field( $_REQUEST['string']['term'] );

    global $wpdb;

    // Query
    $blog_users = $wpdb->get_results( $wpdb->prepare( "SELECT display_name, ID FROM {$wpdb->users} WHERE ID != %d AND display_name LIKE %s;", $user_id, '%' . $string . '%' ), 'ARRAY_N' );

    if ( $wpdb->num_rows > 0 ) {

        foreach ( $blog_users as $hit ) {

            if ( $mycred->exclude_user( $hit[1] ) ) continue;
            $results[] = $hit[0];

        }

    }

    wp_send_json( $results );

}
add_action( 'mycred_transfer_autofill_find', 'mycred_pro_custom_autocomplete', 10, 2 );

// Get the recipient
function mycred_pro_find_transfer_recipient( $recipient_id, $to ) {

    if ( $recipient_id !== false ) return $recipient_id;

    global $wpdb;

    // Get user by display name
    $recipient = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM {$wpdb->users} WHERE display_name = %s", $to ) );
    if ( $recipient !== NULL )
        $recipient_id = $recipient;

    return $recipient_id;

}
add_filter( 'mycred_transfer_get_recipient', 'mycred_pro_find_transfer_recipient', 10, 2 );