Cancel campaign

curl -X POST https://www.realmailers.com/v2/campaigns/1/cancel \
  -H 'Authorization: Bearer YOUR_API_KEY USER_EMAIL'

{
  template_uid: String
  template_id: Number

  expected_delivery_date: Timestamp(ISO8601)
  scheduled_at: Timestamp(ISO8601)
  created_at: Timestamp(ISO8601)
  updated_at: Timestamp(ISO8601)
  sent_at: Timestamp(ISO8601)

  send_copy_to_sender: Boolean
  notification_email: String
  targeting_method: String
  recipient_count: Number
  discount_code: String
  postage_class: String
  price: Number
  name: String
  id: Number

  thumbnails: Array(URL)
  proof: URL

  status: Enum(
    processed_for_delivery
    in_local_area
    in_production
    in_transit
    in_queue
    mailed
    draft)

  designs: Array({
    thumbnail: URL
    height: Number
    width: Number
    file: URL
    crop: {
      height: Number
      width: Number
      y: Number
      x: Number
    }
  })

  qr_codes: {
    front: Array({
      url: String
      height: Number
      width: Number
      y: Number
      x: Number
    })
    back: Array({
      url: String
      height: Number
      width: Number
      y: Number
      x: Number
    })
  }

  targeting_center: {
    coordinates: Array(Number)
    postcard_count: Number
    address: String
  }

  template_data: {
    landing_page_url: String
    square_footage: Number
    lot_size_type: String
    description: String
    maintenance: Number
    back_title: String
    photos: Array(URL)
    bathrooms: Number
    bedrooms: Number
    lot_size: Number
    address: String
    label: String
    price: Number
    taxes: Number

    variables: {
      key: String
    }
  }

  sender: {
    street_address: String
    state: String
    name: String
    city: String
    zip: String
    logo: URL
  }

  agent: {
    license_number: String
    cell_phone: String
    first_name: String
    last_name: String
    landline: String
    email: String
    photo: URL
  }

  meta_data: {
    key: String
  }
}