Get a billing entity by code

{  "id": "b8e2a656-04eb-441c-a6b2-bfab9e2a0f7c",  "code": "acme_inc",  "name": "Acme Inc",  "default_currency": "USD",  "finalize_zero_amount_invoice": true,  "is_default": true,  "address": {    "line1": "123 Business Ave",    "city": "San Francisco",    "state": "CA",    "country": "US",    "postal_code": "94107"  },  "legal_name": "Acme Corporation Inc.",  "legal_number": "US123456789",  "email": "[email protected]",  "timezone": "America/Los_Angeles",  "created_at": "2023-01-15T00:00:00Z",  "updated_at": "2023-01-15T00:00:00Z",  "taxes": [    {      "id": "d4e3c878-16fd-663e-c8d4-dgab0f4c2g9e",      "name": "California State Sales Tax",      "code": "us_ca_sales_tax_8_25",      "description": "California State Sales Tax",      "rate": "8.25",      "created_at": "2023-01-15T00:00:00Z"    }  ]}