curl --request GET \
  --url https://api.qonversion.io/v1/analytics/{projectApiKey}/customers

import requests

url = "https://api.qonversion.io/v1/analytics/{projectApiKey}/customers"

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://api.qonversion.io/v1/analytics/{projectApiKey}/customers', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.qonversion.io/v1/analytics/{projectApiKey}/customers",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

require 'uri'
require 'net/http'

url = URI("https://api.qonversion.io/v1/analytics/{projectApiKey}/customers")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)

response = http.request(request)
puts response.read_body

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.qonversion.io/v1/analytics/{projectApiKey}/customers"

	req, _ := http.NewRequest("GET", url, nil)

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.qonversion.io/v1/analytics/{projectApiKey}/customers")
  .asString();

{
  "data": {
    "total_count": 1542,
    "items": [
      {
        "client_id": 12345,
        "client_uid": "QON_abc123def456",
        "external_identity": "user_42",
        "custom_uid": "user_42",
        "since": 1699000000,
        "last_payment_at": 1701000000,
        "first_transaction_purchase_at": 1700000000,
        "payments_count": 3,
        "purchase_currency": "USD",
        "purchase_product_id": "premium_monthly",
        "net_payments_usd": 49.99,
        "status": 2,
        "trial_status": 2,
        "client_country": "US",
        "device_model": "iPhone15,2",
        "device_id": "ABCDEF12-3456",
        "target_platform": "iOS",
        "device_os_version": "17.4"
      }
    ],
    "page": 1
  }
}

{
  "error": {
    "code": "validation_error",
    "message": "Unprocessable request params",
    "type": "request"
  },
  "meta": {
    "reference": "https://documentation.qonversion.io/reference/handling-api-errors"
  }
}

{
  "error": {
    "code": "validation_error",
    "message": "Unprocessable request params",
    "type": "request"
  },
  "meta": {
    "reference": "https://documentation.qonversion.io/reference/handling-api-errors"
  }
}

{
  "error": {
    "code": "validation_error",
    "message": "Unprocessable request params",
    "type": "request"
  },
  "meta": {
    "reference": "https://documentation.qonversion.io/reference/handling-api-errors"
  }
}

{
  "error": {
    "code": "validation_error",
    "message": "Unprocessable request params",
    "type": "request"
  },
  "meta": {
    "reference": "https://documentation.qonversion.io/reference/handling-api-errors"
  }
}