Show all details of a single plan.
# /open_api/v1/plans/9 { "id": 9, "name": "One year - corporations", "slug": "one-month-corporations", "amount": 36000 "interval": year, "interval_count": 1, "group_id": 3 "disabled": null, "ui_weight": 9, "monthly_payment": true, "updated_at": "2020-12-14 14:10:11.056241000 Z", "created_at": "2020-12-14 14:10:11.056241000 Z", "training_credit_nb": 10, "is_rolling": true, "description": "10 trainings and 30 machine hours offered with your subscription to this plan", "type": "Plan", "plan_category_id": 2, "file": "https://example.com/uploads/plan_file/25/Pricing_Grid_2020_2021_v2.png" }