Get a customer

{  "statusCode": 200,  "statusDetail": {    "status": "SUCCESS",    "message": "OK"  },  "result": {    "customer": {      "id": "cus_abc123",      "slug": "acme-inc",      "name": "Acme Inc",      "description": "AI meeting-notes startup — growth tier",      "email": "ops@acme.com",      "website": "https://acme.com",      "phone": "+1 415 555 0100",      "legalName": "Acme Incorporated",      "addressLine1": "500 Market Street",      "addressLine2": "Suite 400",      "city": "San Francisco",      "state": "CA",      "country": "United States",      "pincode": "94105",      "taxId": "US-EIN 12-3456789",      "notes": "Design partner — invoices reviewed by finance before send",      "logoUrl": "string",      "currencyCode": "USD",      "creditAllowance": 10000,      "createdAt": "2026-07-01T09:30:00.000Z",      "updatedAt": "2026-07-18T11:12:00.000Z"    }  }}

{  "statusCode": 401,  "statusDetail": {    "status": "ERROR",    "message": "Invalid API key."  },  "result": {}}

{  "statusCode": 404,  "statusDetail": {    "status": "ERROR",    "message": "No customer with id \"cus_abc123\"."  },  "result": {}}

{  "statusCode": 500,  "statusDetail": {    "status": "ERROR",    "message": "Could not complete the request."  },  "result": {}}