Returns information about remaining credits

Example response

{
  "credits": {
    "checklimit": 18,
    "availablechecks": 5,
    "useddefault": 6,
    "usedtransaction": 7,
    "availablesms": 20,
    "availablesmstests": 7,
    "availablerumsites": 4,
    "usedrumsites": 1,
    "maxrumfilters": 10,
    "maxrumpageviews": 100000
  }
}