Pls help correct this code to zero error using mexc exchanger documentation

[Dotijo]

import time
import requests
import hashlib
import hmac
import json

def create_signed_request(api_key, secret_key, method, endpoint, params={}):
base_url = 'https://api.example.com'
#50 Replace with the API base URL
request_url = f"{base_url}{endpoint}"
timestamp = int(time.time() * 1000)
params['api_key'] = api_key
params['req_time'] = timestamp
sorted_params = sorted(params.items())
query_string = "&".join([f"{k}={v}" for k, v in sorted_params])

# Fix the ternary if-else statement
to_sign = f"{method}{request_url}?{query_string}" if method == 'GET' else f"{method}{request_url}"

signature = hmac.new(secret_key.encode(), to_sign.encode(), hashlib.sha256).hexdigest()
headers = {
    'X-API-KEY': api_key,
    'Content-Type': 'application/json',
    'Authorization': f"{signature}",
}
if method == 'GET':
    response = requests.get(request_url, headers=headers)
else:
    response = requests.post(request_url, headers=headers, data=json.dumps(params))

if response.status_code == 200:
    return response.json()  # Return the JSON response
else:
    print(f"Failed to retrieve data. Status Code: {response.status_code}")
    return None

def main():
# Read API key and secret key from the user
API_KEY = 'my api key here'
SECRET_KEY = 'my secret key here'

# Example parameters for the /api/v3/rebate/referCode endpoint
params = {
    'param1': 'value1',
    'param2': 'value2',
}

# Make the signed request to the /api/v3/rebate/referCode endpoint
response = create_signed_request(API_KEY, SECRET_KEY, 'POST', '/api/v3/rebate/referCode', params=params)
if response:
    print("Response:")
    print(json.dumps(response, indent=4))
else:
    print("Failed to retrieve data.")

if name == "main":
main()

[Dotijo]

I want it corrected