Discord Bot coding help - Newbie be nice :)

Hi,

I have a discord bot which I really need help implementing a role into a specific command to allow only administrators to access the command.

var db = require(’…/db_helper’);
const db_checker = require(’…/db_checker’);

module.exports = async (msg) => {
var existing = db_checker(msg);
existing.then(async function(result) {
if (result) {
var sql = ‘TRUNCATE TABLE kills_’ + msg.guild.id;
db.query(sql, async function(err) {
if (err) throw err;
var sql = ‘TRUNCATE TABLE players_’ + msg.guild.id;
db.query(sql, async function(err) {
if (err) throw err;
await msg.channel.send(‘Your team kill data has been reset’);
});
});
} else {
await msg.channel.send(‘Goose TK Bot has not been set up on this server. Run !tkstart to do so.’);
}
});
};

This command will reset my stats, but currently its available to all users to run this command. I need to lock it off to certain roles. Could anyone please point me in the right direction? Sorry if this has been answered before or not in correct place.