curl --location --request POST 'https://provisioning.sipay.com.tr/ccpayment/api/installments' \
--header 'Accept: application/json' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
"merchant_key": "$2y$10$HmRgYosneqcwHj.UH7upGuyCZqpQ1ITgSMj9Vvxn.t6f.Vdf2SQFO",
"app_lang": "en"
}'{
"status_code": 100,
"message": "Merchant Active Installment",
"installments": [
1,
2,
3,
4,
5,
6
]
}