DOT-4386: YouCan Pay > Fix bug when we generate an Token & documentat…

…ion (#7)

* DOT-4386: YouCan Pay > Fix bug when we generate an Token & documentation

* DOT-4386: changing readme

* DOT-4386: code review 1

README.md

@@ -34,9 +34,9 @@ You can specify which environment when initializing `YouCanPay` instance
 
 ```php
 use YouCan\Pay\YouCanPay;
-
-$youCanPay = YouCanPay::instance()->useKeys('my-private-key', 'my-public-key');
 
 // enable sandbox mode
 YouCanPay::setIsSandboxMode(true);
+
+$youCanPay = YouCanPay::instance()->useKeys('my-private-key', 'my-public-key');
 ```

src/API/HTTPAdapter/CurlHTTPAdapter.php

@@ -35,7 +35,7 @@ protected function parseHeaders($headers)
 
     public function request(string $method, string $endpoint, array $params = [], array $headers = []): Response
     {
-        $curl = curl_init(sprintf($this->getBaseUrl(), $endpoint));
+        $curl = curl_init(sprintf('%s%s', $this->getBaseUrl(), $endpoint));
         $headers["Content-Type"] = "application/json";
         $headers["Accept"] = "application/json";
 
@@ -47,7 +47,7 @@ public function request(string $method, string $endpoint, array $params = [], ar
         switch (strtolower($method)) {
             case 'post':
                 curl_setopt($curl, CURLOPT_POST, true);
-                curl_setopt($curl, CURLOPT_POSTFIELDS,  $httpBody);
+                curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($params));
 
                 break;
             case 'get':