curl https://api.stripe.com/v1/billing_portal/sessions \ -u sk_test_51HgaxvIHDJDf7jIua3CLcbZr2lbjRBkhpbVoyHusHPwYbMgbHEUS1Yd3UDypyUOP5FRc7qBTBxwFrEr3lNMZH5r400eE6hTym3: \ -d customer=cus_IHMTz1jTK0H8ZA \ -d return_url="https://example.com/account"