Recreate Cerberus password hashing function

I'm trying to migrate users from our legacy Cerberus SFTP server to a new SFTP server. The problem is most of our Cerberus users have password based authentication and all I have access to is their one-way hashed password. Thus I'm trying to reverse engineer how Cerberus hashes it's password so I don't have to ask our 100+ customers to submit a new password to use or switch to a public key based authentication. I'm basically trying to recreate Cerberus's hashing method outside of Cerberus so I can verify "yes this is the same password they used originally" or "no this password does not match"

I came across this blog post that I think details how to do it but I can't seem to get it to work for some reason - https://support.cerberusftp.com/hc/en-us/articles/360000040039-Securely-Storing-User-Passwords.

Here are the steps I've taken so far -

1. created a user in Cerberus with a password of "asdf"
2. exported my collection of users to a CSV file
3. identified the hashed password from the export as follows -
{{PBKDF2 HMAC SHA256}}:5000:42ED67592D7D80F03BF3E2413EB80718C5DAFEB5237FC4E5E309C2940DF1DBB2A4ABD9BB63B8AD285858B532A573D9DE
4. attempted to write a Python script that could hash "asdf" to the same hash as shown above

Here is what my script looks like so far - https://replit.com/@ryangrush/sample.

import hashlib
import base64

password = b'asdf'
salt = b'sample_salt'

combined = salt + password
first = hashlib.pbkdf2_hmac('sha256', combined, b'', 5000)
combined = salt + first
second = hashlib.pbkdf2_hmac('sha256', combined, b'', 5000)
base_16 = base64.b16encode(second)

print(second.hex())
print(base_16)