List all selling plans available to the customer

curl --request GET \
  --url https://www.myshop.com/apps/subscriptions/cp/api/subscription-groups/all-selling-plans

[
  {
    "frequencyCount": 123,
    "billingFrequencyCount": 123,
    "payAsYouGoPrepaidBillingFrequencyCount": 123,
    "frequencyName": "<string>",
    "frequencyDescription": "<string>",
    "discountOffer": 123,
    "discountOffer2": 123,
    "afterCycle1": 123,
    "afterCycle2": 123,
    "discountEnabled": true,
    "discountEnabled2": true,
    "discountEnabledMasked": true,
    "discountEnabled2Masked": true,
    "id": "<string>",
    "specificDayValue": 123,
    "specificMonthValue": 123,
    "specificDayEnabled": true,
    "maxCycles": 123,
    "minCycles": 123,
    "cutOff": 123,
    "prepaidFlag": "<string>",
    "idNew": "<string>",
    "freeTrialEnabled": true,
    "freeTrialCount": 123,
    "memberOnly": true,
    "nonMemberOnly": true,
    "memberInclusiveTags": "<string>",
    "memberExclusiveTags": "<string>",
    "formFieldJson": "<string>",
    "upcomingOrderEmailBuffer": 123,
    "frequencySequence": 123,
    "groupName": "<string>",
    "groupId": 123,
    "repeatingCycle": true,
    "repeatingNumberOfCycle": 123,
    "keepOriginalNextBillingDateAfterTrial": true,
    "defaultSelectedPlan": true,
    "frequencyNameTranslations": {},
    "appstleCycles": [
      {
        "afterCycle": 3,
        "discountType": "PERCENTAGE",
        "value": 10,
        "freeVariantId": 42549172011164,
        "freeProductHandle": "free-gift-product",
        "repeatingCycle": true,
        "repeatingNumberOfCycle": 6,
        "preventDuplicationFreeProduct": true
      }
    ]
  }
]