MS Authenticator shows email domain when using email as label (account name) instead of issuer

[mhagesfeld]

If I use an email address as the "label" in creating the QR code, Microsoft Authenticator uses the domain from the email as the Issuer, rather than the provided issuer.

To wit:
EX 1 - Not Email (i.e. sample code):

• private readonly TwoFactorAuth tfa = new TwoFactorAuth("MyCompany", qrcodeprovider: new QRCoder.QRCoderQRCodeProvider());
• Model.GetQrCodeImageAsDataUri("Bob Ross", (string)Session["secret"])"

RESULT:

EX 2 - Email Label:

• private readonly TwoFactorAuth tfa = new TwoFactorAuth("MyCompany", qrcodeprovider: new QRCoder.QRCoderQRCodeProvider());
• img src="@Model.GetQrCodeImageAsDataUri("[email protected]", (string)Session["secret"])"
  RESULT:
  

However, the email DOES work properly in Google Authenticator:

Any ideas?

[minzdrav]

For guys like me, who is searching for solution:

var tfa = new TwoFactorAuth("YourSiteName", qrcodeprovider: new QRCoderQRCodeProvider());
var secret = tfa.CreateSecret();
var qr = tfa.GetQrCodeImageAsDataUri($"YourSiteName:{userEmail}", secret);

Code is tested in microsoft and google authenticators.