[Solved] Get HTTP error status code

Try this:

const processStatusCode = (code) => {
  if (code === 401) {
    // your logic here 
  }
};

try {
  const result = HTTP.call("POST", 'http://example.com', { data:{"key": "value"}, headers:{'Content-Type' : 'application/json'}});
  processStatusCode(result.statusCode);
} catch (error) {
  processStatusCode(error.response.statusCode);
}