Get Plan

{  "plan": {    "name": "string",    "status": "Active",    "billingData": {      "billingInterval": "Monthly",      "duration": 1,      "paymentTerm": "Postpayment",      "autoRenewal": false,      "proRated": true    },    "id": "string",    "createdAt": "2019-08-24T14:15:22Z",    "updatedAt": "2019-08-24T14:15:22Z"  }}

{  "type": "invalid_request_error",  "code": "string",  "message": "string",  "param": "string",  "params": [    {      "param": "string",      "message": "string"    }  ]}

{  "type": "authentication_error",  "code": "authentication_failed",  "message": "string"}

{  "type": "invalid_request_error",  "code": "resource_not_found",  "message": "string"}

{  "type": "rate_limit_error",  "code": "rate_limit_exceeded",  "message": "string"}

{  "type": "api_error",  "code": "internal_error",  "message": "string"}