curl --request GET \
  --url https://api.yuvexpay.com/v1/customers/external/{externalId} \
  --header 'Authorization: Bearer <token>'

{
  "customer": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "email": "<string>",
    "document": "<string>",
    "phone": "<string>",
    "externalId": "<string>",
    "isActive": true,
    "createdAt": "2023-11-07T05:31:56Z"
  }
}