import RingCentral, { SERVER_SANDBOX } from ‘ringcentral-ts’;
let rc = new RingCentral({
 server: SERVER_SANDBOX, // You should use SERVER_PRODUCTION in production
 appKey: ‘{yourAppKey}’,
 appSecret: ‘{yourAppSecret}’
});
// Log into RingCentral
rc.auth({
 username: ‘{username}’,
 extension: ‘{extension}’,
 password: ‘{password}’
}).then(() => {
 console.log(‘login success’);
 return rc.account().get(); // Call RingCentral REST API
}).then(accountInfo => {
 console.log(“Current account info”, accountInfo);
 return rc.logout(); // Logout
}).then(() => {
 console.log(“logout success”);
}).catch(e => {
 console.error(‘Error occured’, e);
});