I want to setup to get data from Bizfly app according to the following document https://crm.bizfly.vn/apidoc/doc/#api-Help_Support-apiKey. The values ​​in the header are encoded for example the cb-access-sign field I had to code python connect to look like this: time_now = str(int(time.time())) message = str(time_now).encode() + bizfly_project_token.encode() key = api_secret.encode() signature = hmac.new(key, message, hashlib.sha512).hexdigest() df = pd.DataFrame() url = 'https://api.bizfly.vn/crm/_api/base-table/find' headers = { 'cb-access-key': access_token, 'cb-project-token': bizfly_project_token, 'cb-access-timestamp':time_now, 'cb-access-sign': signature, 'Content-Type': 'application/x-www-form-urlencoded' } payload = { "table": data_table, "limit": 1000, "skip": i, "output": "by-key", "query" : query } How to create a valid signature?

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