curl --request GET \
  --url 'https://www.rainbrand.com/api/v1/credits' \
  --header "x-api-key: $RAINBRAND_API_KEY"

{
  "data": {
    "balance": 4200,
    "unlimited": false,
    "pricing_version": 2,
    "free_brand_creations": 0,
    "credit_costs": {
      "brand_creation": 500,
      "brand_edit": 300,
      "brief": 100,
      "review": 200,
      "image_2k": 100,
      "image_4k": 200
    }
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "status": 401,
    "message": "Invalid or missing API credentials",
    "data": "<unknown>"
  }
}

{
  "error": {
    "code": "ACCOUNT_BANNED",
    "status": 403,
    "message": "This account has been suspended.",
    "data": "<unknown>"
  }
}

{
  "error": {
    "code": "WORKSPACE_NOT_FOUND",
    "status": 404,
    "message": "Workspace not found or not accessible",
    "data": "<unknown>"
  }
}

{
  "error": {
    "code": "TOO_MANY_REQUESTS",
    "status": 429,
    "message": "Rate limit exceeded",
    "data": "<unknown>"
  }
}

{
  "error": {
    "code": "INTERNAL_SERVER_ERROR",
    "status": 500,
    "message": "Failed to check credit balance",
    "data": "<unknown>"
  }
}