Yahoo does not accept Authy code when trying to add 2FA.
After scanning QR code, Authy adds Yahoo account to list. Yahoo asks to enter code. Yahoo does not accept code 'Invalid Code'. Attempted numerous times until it said try again later. I de-installed account in Authy, went through process again and received same result.
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Olof Olov commented
unbelievable that yahoo does not support Authy, I use it for a lot of different accounts with no issue....