Bearer.php

<?php
 
namespace Http\Message\Authentication;
 
use Http\Message\Authentication;
use Psr\Http\Message\RequestInterface;
 
final class Bearer implements Authentication
{
    private $token;
 
    public function __construct($token)
    {
        $this->token = $token;
    }
 
    public function authenticate(RequestInterface $request)
    {
        $header = sprintf('Bearer %s', $this->token);
 
        return $request->withHeader('Authorization', $header);
    }
}