for python:

def sid_to_bytes(sid: str) -> bytes:
    sid = sid.replace('S-', '')
    sid = sid.split('-')

    c = int_to_bytes(int(sid[0]), 1)
    c += int_to_bytes(len(sid) - 2, 1)

    for i in range(0, 5):
        c += int_to_bytes(0, 1)

    c += int_to_bytes(int(sid[1]), 1)

    for i in range(2, len(sid)):
        c += int_to_bytes(int(sid[i]), 4)

    return c

Article how to do it: https://sergeyvasin.wordpress.com/2017/09/06/convertfrom-sthsid/