Can not call external api in aws lambda function

I was going to call third party api in the aws lambda function with request. But it shows timeout error. I set the lambda function time 30s and when I call that api by using postman it send response(error) with in 5 seconds. I think the request or axios can't send the request to the external api or can't receive the response. Can anyone help me? My code:

  request.post({url:url2, json:true, body:body, headers: {
    'ACCESS_TIMESTAMP': timestamp,
    'Content-Type': 'application/json'
  } }, (error, response, body) => {
  console.log("------------------I am here----------------------")
  callback(null, error)
})

When I use the axios the code is like below:

let jsonbody = JSON.stringify(body)
axios.post(url2, jsonbody,  {headers: {
      'ACCESS_TIMESTAMP': timestamp,
      'Content-Type': 'application/json'
    }})
.then(res => {
  callback(null, res.data)
})
.catch(err => {
  callback(null, err)
})

I want to get the result of res or err but they don't act.