curl --request POST \
  --url sftp://sftp.tangoanalytics.com/outbound/PO \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: text/plain' \
  --data '<string>'

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'text/plain'},
  body: '<string>'
};

fetch('sftp://sftp.tangoanalytics.com/outbound/PO', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "sftp://sftp.tangoanalytics.com/outbound/PO"

payload = "<string>"
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "text/plain"
}

response = requests.post(url, data=payload, headers=headers)

print(response.text)