hotp.go
func (otp HOTP) Counter() uint64 {
	counter := binary.BigEndian.Uint64(otp.counter[:])
	return counter
}
func (otp HOTP) Counter() uint64 {
	counter := binary.BigEndian.Uint64(otp.counter[:])
	return counter
}
func ( otp HOTP ) Counter ( ) uint64 { counter := binary . BigEndian . Uint64 ( otp . counter [ : ] ) return counter }
// Counter returns the HOTP's 8-byte counter as an unsigned 64-bit
// integer.
Counter returns the HOTP s 8 - byte counter as an unsigned 64 - bit integer .