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: connection.go
    path of file: ./repos/db/adapter/mongo
    
    the code of the file until where you have to start completion: // Copyright (c) 2012-present The upper.io/db authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Sof
    
func ParseURL(s string) (conn ConnectionURL, err error) {
	var u *url.URL

	if !strings.HasPrefix(s, connectionScheme+"://") {
		return conn, fmt.Errorf(`Expecting mongodb:// connection scheme.`)
	}

	if u, err = url.Parse(s); err != nil {
		return conn, err
	}

	conn.Host = u.Host

	// Deleting / from start of the string.
	conn.Database = strings.Trim(u.Path, "/")

	// Adding user / password.
	if u.User != nil {
		conn.User = u.User.Username()
		conn.Password, _ = u.User.Password()
	}

	// Adding options.
	conn.Options = map[string]string{}

	var vv url.Values

	if vv, err = url.ParseQuery(u.RawQuery); err != nil {
		return conn, err
	}

	for k := range vv {
		conn.Options[k] = vv.Get(k)
	}

	return conn, err
}