curl -X POST "https://api.bridgeagw.com/sms/balance" \
  -H "Authorization: Basic <your_credentials>" \
  -H "Content-Type: application/json" \
  -d '{
    "service_id": 1
  }'

const response = await fetch('https://api.bridgeagw.com/sms/balance', {
  method: 'POST',
  headers: {
    'Authorization': 'Basic <your_credentials>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    service_id: 1
  })
});

const result = await response.json();
console.log(result);

import requests

url = "https://api.bridgeagw.com/sms/balance"
headers = {
    "Authorization": "Basic <your_credentials>",
    "Content-Type": "application/json"
}
data = {
    "service_id": 1
}

response = requests.post(url, headers=headers, json=data)
result = response.json()
print(result)