curl --request GET \
  --url https://staging.api.commercengine.io/api/v1/{store_id}/storefront/auth/user/{id} \
  --header 'Authorization: Bearer <token>'

{
  "message": "<string>",
  "success": true,
  "content": {
    "user": {
      "id": "<string>",
      "first_name": "<string>",
      "last_name": "<string>",
      "email": "jsmith@example.com",
      "is_email_verified": true,
      "phone": "<string>",
      "country_code": "<string>",
      "is_phone_verified": true,
      "profile_image_url": "<string>",
      "is_anonymous": true,
      "is_logged_in": true,
      "login_methods": [],
      "notification_preferences": {
        "transactional": {
          "email": true,
          "sms": true,
          "whatsapp": true
        },
        "promotional": {
          "email": true,
          "sms": true,
          "whatsapp": true
        },
        "newsletter": {
          "email": true,
          "sms": true,
          "whatsapp": true
        }
      },
      "customer_id": "<string>",
      "customer_group": {
        "id": "<string>",
        "name": "<string>",
        "slug": "<string>",
        "description": "<string>",
        "is_default": true,
        "active": true
      },
      "business": {
        "type": "<string>",
        "name": "<string>",
        "metadata": {},
        "registered_address": {
          "first_name": "<string>",
          "last_name": "<string>",
          "country_code": "<string>",
          "phone": "<string>",
          "email": "<string>",
          "address_line1": "<string>",
          "address_line2": "<string>",
          "landmark": "<string>",
          "pincode": "<string>",
          "city": "<string>",
          "state": "<string>",
          "country": "<string>",
          "tax_identification_number": "<string>",
          "business_name": "<string>",
          "is_phone_verified": true,
          "is_email_verified": true,
          "id": "<string>",
          "is_default_billing": true,
          "is_default_shipping": true,
          "nickname": null
        }
      },
      "created_at": "<string>",
      "modified_at": "<string>"
    }
  }
}