package main

import(
	"context"
	"os"
	polargo "github.com/polarsource/polar-go"
	"log"
)

func main() {
    ctx := context.Background()

    s := polargo.New(
        polargo.WithSecurity(os.Getenv("POLAR_ACCESS_TOKEN")),
    )

    res, err := s.Customers.GetExternal(ctx, "<id>")
    if err != nil {
        log.Fatal(err)
    }
    if res.Customer != nil {
        // handle response
    }
}

{
  "id": "992fae2a-2a17-4b7a-8d9e-e287cf90131b",
  "created_at": "2023-11-07T05:31:56Z",
  "modified_at": "2023-11-07T05:31:56Z",
  "metadata": {},
  "external_id": "usr_1337",
  "email": "customer@example.com",
  "email_verified": true,
  "name": "John Doe",
  "billing_address": {
    "line1": "<string>",
    "line2": "<string>",
    "postal_code": "<string>",
    "city": "<string>",
    "state": "<string>",
    "country": "US"
  },
  "tax_id": [
    "911144442",
    "us_ein"
  ],
  "organization_id": "1dbfc517-0bbf-4301-9ba8-555ca42b9737",
  "deleted_at": "2023-11-07T05:31:56Z",
  "avatar_url": "https://www.gravatar.com/avatar/xxx?d=404"
}