Cancel all orders

• 30 - default validation error code
• 31 - market validation failed

{
  "code": 31,
  "message": "Validation failed",
  "errors": {
    "market": ["Market is not available."]
  }
}

{
  "code": 30,
  "message": "Validation failed",
  "errors": {
    "type": ["The type must be an array."]
  }
}

{
  "code": 30,
  "message": "Validation failed",
  "errors": {
    "market": [
      "Market field should be a string.",
      "Market field format is invalid."
    ]
  }
}