API CONNECT - WEBREQUEST PROBLEM

Hello!

I'm having trouble putting together the code to connect to a database and control a query.

I created this code through some queries but I have an error when complicating code 4029.

void Check()

  {

   string uri = "END_POINT_API";

   char post[100];

   char result1[100];

   string headers;

   string APIKEY = "";

   string LICENCEKEY = "";

   int res;

   string signal = "?api_key=" + APIKEY + "&license_key=" + LICENSEKEY;

   StringToCharArray(signal, post);

// Construct the request headers

   headers = "Content-Type: application/json";  // Set the correct header format

// Reset last error

   ResetLastError();

// Post data to REST API

   res = WebRequest(

            "POST",

            uri,

            headers,        // Pass headers as a string

            10,             // Timeout in seconds

            post,

            result1,        // Store the response in result1

            headers         // Response headers (optional)

         );

// Check errors

   if(res == -1)

     {

      int error_code = GetLastError();

      string error_msg = ErrorDescription(error_code);

      Print("Error in Webquest. Error Code ",error_code," Error ",error_msg);

      if(error_code==4060)

        {

         MessageBox("Add address '"+uri+"' in Expert Advisors tab of the Options window", "Error", MB_ICONINFORMATION);

        }

      else

        {

         // Successful

         Print("REST client's POST: ", signal);

         Print("Server response: ", CharArrayToString(result1, 0, -1));

        }

     }

  }

//+------------------------------------------------------------------+

It is important to mention that I inserted my end-point in the metatrader 4 options, ruling out that this is why the connection problem occurred.