GitHub nodejs login via user credentials

git-login.js

const got = require('got');
const chalk = require('chalk');

(async () => {
	console.clear();
	const [username, password] = process.argv.splice(2);
	
	if ( username.includes('-') ) {
		const flag = username.replace(/\-+/, '');

		if ( flag === 'help' || flag === 'h' ) {
			console.log();
			console.log(chalk`{bold Usage}`)
			console.log(chalk`  {green $} {yellow git-info <username> <password>}`)
		} else console.log(flag);
		process.exit();
	}

	try {
		const { body } = await got('https://api.github.com/user', {
			headers: { 'Authorization': 'Basic ' + btoa(username + ':' + password) }
		});

		const user = JSON.parse(body);

		console.log(chalk`Welcome {bold {rgb(0, 128, 255) ${user.login}}}, your profile id is: "{dim ${user.id}}"`)
		console.log(chalk`Your plan is: {underline ${user.plan.name}} and you have {yellow ${user.plan.private_repos}} private repos`);
		console.log();

	} catch (error) {
		if ( !error.statusMessage ) {
			throw error;
		}

		console.log();
		console.log(chalk`{red {bold Error}}: ${error.statusMessage}`);
	}
})()


/**
 * @description string to base64
 * @param {String} string
 */
function btoa(string) {
	return Buffer.from(string).toString('base64')
}

/**
 * @description base64 to string
 * @param {String} ecoded
 */
function atob(ecoded) {
	return Buffer.from(encoded, 'base64').toString()
}