Why is $_POST empty (axios)?

Question

PHP

Good afternoon. The problem is that when I send data via axios. In response, I get an empty $_POST.
request code

axios.post("/api.php?action=create", {myvalue:'строка', sub:'ahaha', value:22})
      .then(function(response){
        	console.log('Что-то произошло');
        if(response.data.error){
          app.errorMessage = response.data.message; 
          console.log('ошибка');
        } else{
          console.log('отлично');
        }
      });
      },

Answer 1

Thank you all for your replies, issue resolved.
In order for $_POST not to be empty, you must first write in PHP:

$_POST = json_decode(file_get_contents('php://input'), true);

and then access the necessary attributes