https://github.com/cf-coin/loc.git

simple_form hints two_factor otp_secret
en	We recommend that you back up QR code image or ciphertext to avoid that you accidental loss of the phone for the inconvenience.
zh-CN	建议您备份好二维码图片或者密文，以免手机意外丢失后给您带来不便。

oslivan https://github.com/cf-coin/loc.git