getUpcomingInvoice

{
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "currency": {
      "type": "string",
      "description": "Payment currency."
    },
    "description": {
      "type": "string",
      "description": "Description"
    },
    "headline": {
      "type": "string",
      "description": "Headline"
    },
    "id": {
      "type": "string",
      "description": "The if of a discount for a user."
    },
    "initialCost": {
      "type": "number",
      "description": "The initial cost."
    },
    "longDescription": {
      "type": "string",
      "description": "Long description"
    },
    "nickname": {
      "type": "string",
      "description": "Discount nickname."
    },
    "offerdurationperiod": {
      "type": "string",
      "description": "How long the descount will be valid for."
    },
    "shortDescription": {
      "type": "string",
      "description": "Short description"
    }
  },
  "additionalProperties": false
}