{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "SessionCreate",
  "type": "object",
  "properties": {
    "creditcard": {
      "type": "integer",
      "title": "Credit Card"
    },
    "balance": {
      "type": "string",
      "format": "decimal",
      "pattern": "^-?\\d{0,9}(?:\\.\\d{0,2})?$"
    },
    "statement_date": {
      "type": "string",
      "format": "date-time",
      "nullable": true
    }
  },
  "required": [
    "creditcard"
  ]
}