Unable to get set-cookie value from header with axios reactjs

I am using react js and i have an axios.get function which is supposed to return me a value of set-cookie . Before axios i tried fetch but when running response.headers.get(“set-cookie”) it gives null . For axios , response.headers[“set-cookie”] gives undefined . Why headers don’t contain set-cookie ?

 axios.get(server + '/QryIsapi.dll?Login&login=' + username + '&password=' + password + '&action=login' + '&Expire=' + !stay_connected, {
      headers: new Headers({
        "Content-Type": 'text/plain',
        "Accept": "text/plain",
        "Accept-Language": accept_language
      }),
      withCredentials: true
    }).then(response => {
      
      
      console.log(response.headers["set-cookies"])  //gives undefined
    
    
    }).catch(function (data) {

      console.log("Login : ", data)

    })