trying to connect SQL using node js - node.js

Question

app.get('/', function (req, res) {
var config = {
user: 'sa',
password: '',
server: 'localhost',
database: 'TestDB'
};
// connect to your database
sql.connect(config, function (err) {
if (err) console.log(err);
// create Request object
var request = new sql.Request();
// query to the database and get the records
request.query('select * from userInfo', function (err, recordset) {
if (err) console.log(err)
// send records as a response
res.send(recordset);
console.log(recordset);
});
});
});
Getting this error in command prompt
{ Error: Failed to connect to localhost:1433 - Could not connect (sequence)
at Connection.tedious.once.err (D:\Nodejs\UsersCreate\node_modules\mssql\lib\tedious.js:216:17)
at Object.onceWrapper (events.js:293:19)
at emitOne (events.js:96:13)
at Connection.emit (events.js:191:7)
at Connection.socketError (D:\Nodejs\UsersCreate\node_modules\tedious\lib\connection.js:875:14)
at D:\Nodejs\UsersCreate\node_modules\tedious\lib\connection.js:740:25
at SequentialConnectionStrategy.connect (D:\Nodejs\UsersCreate\node_modules\tedious\lib\connector.js:153:9)
at Socket.onError (D:\Nodejs\UsersCreate\node_modules\tedious\lib\connector.js:169:16)
at emitOne (events.js:96:13)
at Socket.emit (events.js:191:7)
code: 'ESOCKET',
originalError:
{ ConnectionError: Failed to connect to localhost:1433 - Could not connect (sequence)
at ConnectionError (D:\Nodejs\UsersCreate\node_modules\tedious\lib\errors.js:12:12)
at Connection.socketError (D:\Nodejs\UsersCreate\node_modules\tedious\lib\connection.js:875:30)
at D:\Nodejs\UsersCreate\node_modules\tedious\lib\connection.js:740:25
at SequentialConnectionStrategy.connect (D:\Nodejs\UsersCreate\node_modules\tedious\lib\connector.js:153:9)
at Socket.onError (D:\Nodejs\UsersCreate\node_modules\tedious\lib\connector.js:169:16)
at emitOne (events.js:96:13)
at Socket.emit (events.js:191:7)
at emitErrorNT (net.js:1284:8)
at _combinedTickCallback (internal/process/next_tick.js:80:11)
at process._tickCallback (internal/process/next_tick.js:104:9)
message: 'Failed to connect to localhost:1433 - Could not connect (sequence)',
code: 'ESOCKET' },
name: 'ConnectionError' }
{ ConnectionError: Connection is closed.
at Request._query (D:\Nodejs\UsersCreate\node_modules\mssql\lib\base.js:1299:37)
at Request._query (D:\Nodejs\UsersCreate\node_modules\mssql\lib\tedious.js:497:11)
at Request.query (D:\Nodejs\UsersCreate\node_modules\mssql\lib\base.js:1242:12)
at D:\Nodejs\UsersCreate\app.js:118:17
at _poolCreate.then.catch.err (D:\Nodejs\UsersCreate\node_modules\mssql\lib\base.js:269:7)
at process._tickCallback (internal/process/next_tick.js:109:7) code: 'ECONNCLOSED', name: 'ConnectionError' }
undefined
Please help me on this error and need navigation to rectify this error