How to send data in a POST request to the server?

Hi,

I am writing a website in ASP .Net Core 3. I want to implement a method which will take 2 parameters in the POST query. The data sent to the server should be plain text, not JSON, e.g.

request POST

example.com/api

the content of the task

message_1="content"&message_2="content_2"

<pre>The following function calls but the parameters are null.
How is it going to change it?

[HttpPost]
[Route("/api")]
public IActionResult Api(string message_1, string message_2)
 {
    return View();
 }