API BASIC Authentication Help

I keep getting an authentication error (401) any one see any issues with my code? 



var customerID = 'xxxx';
var clientSecret = 'yyyyy';
var encodedData = btoa(customerID + ':' + clientSecret);
var authorizationHeaderString = 'Authorization: Basic ' + encodedData;

var myHeaders = new Headers();
myHeaders.append("Access-Control-Allow-Origin","https://secure.logmein.com")
myHeaders.append("Access-Control-Request-Headers", "https://airtables.com")
myHeaders.append("Authorization" , authorizationHeaderString)
 
var formdata = new FormData();
formdata.append("groups", "");

var requestOptions = {
  method: 'GET',
  mode: 'no-cors',
  headers: myHeaders,
  redirect: 'follow',

};

fetch("https://secure.logmein.com/public-api/v2/hosts", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));