Python code to generate appsecret_proof and appsecret_time need to call Workplace API with appsecret_proof configured: https://developers.facebook.com/docs/workplace/reference/permissions/#appsecretproof

appsecretproof.py

import hmac
import hashlib
import time
access_token = 'access_token'
app_secret = 'app_secret'
time = int(time.time())
hmac_secret = app_secret.encode()
hmac_data = (access_token+'|'+str(time)).encode()
app_secret_proof=hmac.new(hmac_secret,hmac_data,hashlib.sha256).hexdigest()
print('Time:', time)
print('Data:', hmac_data)
print('Secret:', hmac_secret)
print('App Secret Proof:', app_secret_proof)