I was a twilio customer developer until they instituted a change that demanded to know my personal phone number in order to login to their account. They claimed

I was a twilio customer developer until they instituted a change that demanded to know my personal phone number in order to login to their account. They claimed this was for security, but TOTP doesn't require a phone number. After a meeting with their engineering staff, I realized that they completely screwed up their TOTP implementation and they needed the phone number as the seed. Since I wasn't going to give them my phone number, that brought our customer relationship to an end. They clearly had no idea how to spell the word privacy.