https://github.com/tst2005/GATO/tree/master/totp
https://github.com/google/google-authenticator/wiki/Key-Uri-Format
otpauth://totp/Example:alice@google.com?secret=JBSWY3DPEHPK3PXP&issuer=Example
Mon example:
otpauth://totp/Sample:test?secret=MFRGGZDFMZTWQ2LK&issuer=Example
FreeOTP
QRCode generator
https://addons.mozilla.org/en-US/firefox/addon/qr-code-image-generator/?src=api