PHP Adapter Pattern

index.php

<?php

class AuthSystem {

    /**
     * @var EmailLoginInterface
     */
    private $login;

    public function __construct(EmailLoginInterface $login)
    {
        $this->login = $login;
    }

    public function auth($username, $password)
    {
        return $this->login->login($username, $password);
    }
}

class Credential {

    private $data;

    public function __construct($data)
    {
        $this->data = $data;
    }
}

interface EmailLoginInterface {

    /**
     * @param $username
     * @param $password
     * @return Credential
     */
    public function login($username, $password): Credential;

}

class EmailLogin implements EmailLoginInterface {

    public function login($username, $password): Credential
    {
        return new Credential('LOGIN CREDENTIAL');
    }

}

interface TokenLoginInterface {


    public function authToken($token): Credential;

}

class JWTLogin implements TokenLoginInterface {

    public function authToken($token): Credential
    {
        return new Credential('Auth JWT ' . $token);
    }
}

class AmazonLogin implements TokenLoginInterface {

    public function authToken($token): Credential
    {
        return new Credential('Amazon Token  ' . $token);
    }


}

class TokenAdapter implements EmailLoginInterface {

    /**
     * @var TokenLoginInterface
     */
    private $tokenLogin;

    public function __construct(TokenLoginInterface $tokenLogin)
    {
        $this->tokenLogin = $tokenLogin;
    }

    public function login($username, $password): Credential
    {
        return $this->tokenLogin->authToken($username);
    }

}

var_dump((new AuthSystem(new EmailLogin()))->auth('bill@gmail.com', 'pass'));

var_dump((new AuthSystem(new TokenAdapter(new JWTLogin())))->auth('TOKEN', null));

var_dump((new AuthSystem(new TokenAdapter(new AmazonLogin())))->auth('AMAZON TOKEN', null));