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: path.go
    path of file: ./repos/upspin/path
    
    the code of the file until where you have to start completion: // Copyright 2016 The Upspin Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package path provi
    
func Parse(pathName upspin.PathName) (Parsed, error) {
	name := string(pathName)
	// Pull off the user name.
	var userName string
	slash := strings.IndexByte(name, '/')
	if slash < 0 {
		userName = name
	} else {
		userName = name[:slash]
	}
	if _, _, _, err := user.Parse(upspin.UserName(userName)); err != nil {
		// Bad user name.
		return Parsed{}, err
	}
	p := Parsed{
		// If pathName is already clean, which it usually is, this will not allocate.
		path: Clean(pathName),
	}
	return p, nil
}