var authenticationManager = new OfficeDevPnP.Core.AuthenticationManager();
ClientContext context = authenticationManager.GetWebLoginClientContext(@"https://XXX-admin.sharepoint.com/", null);
GetAllSiteCollections(context);

Message: The request was aborted: The request was canceled.
InnerException: Microsoft.SharePoint.Client.IdcrlException: Identity Client Runtime Library (IDCRL) could not look up the realm information for a federated sign-in.
at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.GetUserRealm(String login)
at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.GetServiceToken(String username, String password, String serviceTarget, String servicePolicy)
at Microsoft.SharePoint.Client.Idcrl.SharePointOnlineAuthenticationProvider.GetAuthenticationCookie(Uri url, String username, SecureString password, Boolean alwaysThrowOnFailure, EventHandler`1 executingWebRequest)
at Microsoft.SharePoint.Client.SharePointOnlineCredentials.GetAuthenticationCookie(Uri url, Boolean refresh, Boolean alwaysThrowOnFailure)
at Microsoft.SharePoint.Client.SharePointOnlineAuthenticationModule.GetSpoAuthCookieAndUpdateRequest(WebRequest request, SharePointOnlineCredentials spoCredentials, Boolean preAuthentication)
at Microsoft.SharePoint.Client.SharePointOnlineAuthenticationModule.Authenticate(String challenge, WebRequest request, ICredentials credentials)
at System.Net.AuthenticationManagerDefault.Authenticate(String challenge, WebRequest request, ICredentials credentials)
at System.Net.AuthenticationState.AttemptAuthenticate(HttpWebRequest httpWebRequest, ICredentials authInfo)
at System.Net.HttpWebRequest.CheckResubmitForAuth()
at System.Net.HttpWebRequest.CheckResubmit(Exception& e, Boolean& disableUpload)
at System.Net.HttpWebRequest.DoSubmitRequestProcessing(Exception& exception)
at System.Net.HttpWebRequest.ProcessResponse()
at System.Net.HttpWebRequest.SetResponse(CoreResponseData coreResponseData)

private static void GetFilesPropertiesFromSite()
        {
            try
            {
                Console.WriteLine("Enter admin username: ");
                string username = Console.ReadLine();
                Console.WriteLine("Enter password: ");
                string password = Console.ReadLine();

                var Uri = new Uri(@"https://XXX.sharepoint.com/sites/AL/");
                var credentials = PrepareSPOCredentials(username, password);
                var result = ExecuteSearchRequest(Uri, credentials, "contentclass:STS_ListItem AND ContentType:Task");

            }
            catch (Exception ex)
            {
                Console.WriteLine("Message: " + ex.Message);
                Console.WriteLine("InnerException: " + ex.InnerException);
            }
        }

        private static SharePointOnlineCredentials PrepareSPOCredentials(string userName, string passWord)
        {
            var securePassWord = new SecureString();
            foreach (var c in passWord.ToCharArray()) securePassWord.AppendChar(c);
            var credentials = new SharePointOnlineCredentials(userName, securePassWord);
            return credentials;
        }