No 'Access-Control-Allow-Origin' header is present on the requested Resource. API Codewars

Question

I was making a request on the Codewars API and had this problem. However, I don’t know how to fix it.

Access to XMLHttpRequest at 'https://www.codewars.com/api/v1/users/ThaysMrtns?access_key=DuNKdgzmE585M2e9CPJj' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.  

class UsuarioController{
    constructor(){

    }
    //Requisição de dados da API para o nosso usuário
    dadosUsuario(){
        let requisicao = new XMLHttpRequest();
        requisicao.open("GET", `https://www.codewars.com/api/v1/users/ThaysMrtns?access_key=DuNKdgzmE585M2e9CPJj`);
        requisicao.send();
        //let dados = requisicao.JSON.parse(requisicao.responseText);
        console.log(requisicao.responseText);
    }
}