You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: user_windows.go
    path of file: ./repos/goldfish/vendor/github.com/lib/pq
    
    the code of the file until where you have to start completion: // Package pq is a pure Go Postgres driver for the database/sql package.
package pq

import (
	"path/filepath"
	"syscall"
)

// Perform Windows user name lookup identically to libpq.
//
// The PostgreSQL code makes use of the legacy Win32 function
// Ge
    
func userCurrent() (string, error) {
	pw_name := make([]uint16, 128)
	pwname_size := uint32(len(pw_name)) - 1
	err := syscall.GetUserNameEx(syscall.NameSamCompatible, &pw_name[0], &pwname_size)
	if err != nil {
		return "", ErrCouldNotDetectUsername
	}
	s := syscall.UTF16ToString(pw_name)
	u := filepath.Base(s)
	return u, nil
}