DataService web service with Python 3: login, sesión and get rows

import json
import requests
 
login_url = "https://my.bpmonline.com/ServiceModel/AuthService.svc/Login"
headers = {"Content-Type": "application/json"}
login_json = {"UserName": "Supervisor", "UserPassword": "password"}
 
# Login and get the session cookie
session = requests.post(login_url, headers=headers, json=login_json)
 
select_url = 'https://my.bpmonline.com/0/dataservice/json/reply/SelectQuery'
 
# Set the http header BPMCSRF to run the JSON query
headers['BPMCSRF'] = session.cookies.get_dict()['BPMCSRF']
 
# The JSON query to DataService
select_contact_json = {
    "RootSchemaName":"Contact",
    "OperationType":0,
    "Columns":{
        "Items":{
            "GivenName":{
                "Expression":{
                    "ExpressionType":0,
                    "ColumnPath":"GivenName"
                }
            },
            "MiddleName":{
                "Expression":{
                    "ExpressionType":0,
                    "ColumnPath":"MiddleName"
                }
            },
            "Surname":{
                "Expression":{
                    "ExpressionType":0,
                    "ColumnPath":"Surname"
                }
            },
            "BirthDate":{
                "Expression":{
                    "ExpressionType":0,
                    "ColumnPath":"BirthDate"
                }
            }
        }
    },
    "AllColumns":1
}
 
select_contact_response = requests.post(select_url, headers=headers, cookies=session.cookies, json=select_contact_json)
select_contact_json_data = json.loads(select_contact_response.text)
 
# print(select_contact_response.status_code)
print(select_contact_response.text)