curl --request POST \
  --url https://staging.api.commercengine.io/api/v1/{store_id}/storefront/auth/register/email \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "email": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "phone": "<string>"
}'

{
  "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": [
        "email"
      ],
      "notification_preferences": {
        "transactional": {
          "email": true,
          "sms": true,
          "whatsapp": true
        },
        "promotional": {
          "email": true,
          "sms": true,
          "whatsapp": true
        },
        "newsletter": {
          "email": true,
          "sms": true,
          "whatsapp": true
        }
      },
      "created_at": "<string>",
      "modified_at": "<string>"
    },
    "access_token": "<string>",
    "refresh_token": "<string>"
  }
}