컬을 사용하여 웹 페이지에 로그인하는 방법은 무엇입니까?

Testing site: http://testing-ground.scraping.pro/login
Username: admin
Password: 12345

컬 도움말

-u, --user <user:password> Server user and password

웹 양식입니다.

wolf@linux:~$ curl http://testing-ground.scraping.pro/login 2>/dev/null | sed -n '/<form/,/form>/'p
    <form action="login?mode=login" method="POST">
        <label for="usr">User name:</label>
        <input id="usr" name="usr" type="text" placeholder="enter 'admin' here">
        <label for="pwd">Password:</label>
        <input id="pwd" name="pwd" type="text" placeholder="enter '12345' here">
        <input type="submit" value="Login">
    </form>
wolf@linux:~$ 

자격 증명 없이 컬링

wolf@linux:~$ curl http://testing-ground.scraping.pro/login?mode=login 2>/dev/null | egrep 'DENIED|WELCOME'
        <li>If you see <span class="success">WELCOME :)</span> then the user credentials were sent, the cookie was passed and HTTP redirect was processed</li>
        <li>If you see <span class="error">ACCESS DENIED!</span> then either you entered wrong credentials or they were not sent to the server properly</li>
<h3 class='error'>ACCESS DENIED!</h3><a href='login'>&lt;&lt;&nbsp;GO BACK</a></div>
wolf@linux:~$ 

그러나 자격 증명을 사용한 컬에도 -u admin:12345동일한 페이지가 표시됩니다.

wolf@linux:~$ curl http://testing-ground.scraping.pro/login?mode=login -u admin:12345 2>/dev/null | egrep 'DENIED|WELCOME'
        <li>If you see <span class="success">WELCOME :)</span> then the user credentials were sent, the cookie was passed and HTTP redirect was processed</li>
        <li>If you see <span class="error">ACCESS DENIED!</span> then either you entered wrong credentials or they were not sent to the server properly</li>
<h3 class='error'>ACCESS DENIED!</h3><a href='login'>&lt;&lt;&nbsp;GO BACK</a></div>
wolf@linux:~$ 

이 상황에서 컬을 사용하는 올바른 방법은 무엇입니까?