결제 연동 중 빌링키 발급에서 상태코드 500이 반환됩니다.

url = 'https://api.tosspayments.com/v1/billing/authorizations/issue'
data = {'authKey': auth_key, 'customerKey': order.user.customer_key}
response = requests.post(url=url, json=data, headers=self.get_request_headers(order=order))

url = 'https://api.tosspayments.com/v1/billing/authorizations/issue'
data = {'authKey': auth_key, 'customerKey': order.user.customer_key}
response = requests.post(url=url, json=data, headers=self.get_request_headers(order=order))