otpgen

type HOTP struct {
	Secret  string // Secret key (required)
	Digits  int    //OTP digit count (default: 6)
	Counter int64  // Counter value (default: 0)
}

type TOTP struct {
	Secret    string // Secret key (required)
	Digits    int    // OTP digit count (default: 6)
	Algorithm string // OTP Algorithm ("SHA1" or "SHA256" or "SHA512")
	Period    int64  // Period for which OTP is valid (seconds) (default: 30)
	UnixTime  int64  // (Optional) Unix Timestamp (default: Current unix timestamp)
}