Nicki 
Get names of users by uids from /etc/passwd (or from dscl on darwin).
Install
npm i nicki --save
Hot to use?
const nicki = require('nicki');
const names = await nicki();
/*
* Could be something like this
{
'0': 'root',
'1': 'daemon',
'2': 'bin',
'3': 'sys',
'4': 'sync',
'5': 'games',
'6': 'man',
'7': 'lp',
'8': 'mail',
'9': 'news',
'10': 'uucp',
'13': 'proxy',
'33': 'www-data',
'34': 'backup',
'38': 'list',
'39': 'irc',
'41': 'gnats',
'100': 'libuuid',
'101': 'syslog',
'102': 'messagebus',
'103': 'landscape',
'104': 'sshd',
'105': 'colord',
'106': 'debian-deluged',
}
*/How it works?
Nicki parses /etc/passwd and makes object where key is uid and value is name.
License
MIT