Streaming Dataset using the PUSH URL?

Hello all,
Im sorry this might sound very noob. Im new to Power BI.
Here's my problem.

Is it possible to send a data stream to the PUSH URL in streaming datasets without using any type of authentication.

I mean, I have seen in THIS VIDEO that you can send a data stream without authentication. Also THIS ARTICLE.

I have the following data stream sent using an ESP8266 Module.

   [
      {
       "Temperature" : 90,
       "Humidity" : 80
      }
   ]

If I send to the Push Url using HTTP POST method, should it work?
I created a streaming dataset with the above fields in power BI, and sent the data using the ESP module.

But power BI didn't show any data.

What did I do wrong? Please help.

Im using this Code:

const size_t bufferSize = JSON_ARRAY_SIZE(1) + JSON_OBJECT_SIZE(2);
DynamicJsonBuffer jsonBuffer(bufferSize);
JsonArray& root = jsonBuffer.createArray();
JsonObject& root_0 = root.createNestedObject();
root_0["Temperature"] = 90;
root_0["Humidity"] = 80;
root.printTo(Serial);

Your help is much appreciated.
Thank you all.