Verbinden met MySQL lukt niet.

<form class="login-form" id="login-form" action="connect.php" method="post" />
            <label class="login-form__label">Email / Username:
                <input class="login-form__text" type="text" name="username" id="login-username" maxlength="200" title="Enter your Email / Username:" value="" autofocus="" autocomplete="email" required="" data-test="username">
                <span class="form-error">
                    This field is required.
                </span>
            </label>
            <label class="login-form__label">Password:
                <input class="login-form__text" type="password" name="password" id="login-password" maxlength="20" title="Enter your password" autocomplete="current-password" required="" data-test="password">
                <span class="form-error">
                    This field is required.
                </span>
            </label>
            <button class="a-button a-button--size-full" id="rs-login-submit" type="submit" data-test="login">Log In</button>

        </form>

<?php

define ('DB_NAME', '');
define ('DB_USER', '');
define ('DB_PASSWORD', '***');
define ('DB_HOST', 'localhost');

$link = mysql_connect (DB_HOST, DB_USER, DB_PASSWORD);

if (!$link) { 
die ('Could not connect: ' . mysql_error());
- }

 $db_selected = mysql_select_db (DB_NAME, $link);

 if (!$db_selected) {
 	die('can\'t use ' . DB_NAME . ': ' . mysql_error());
 - }

 $value = $_POST['username']
 $value2 = $_POST['password'];

 $sql = "INSERT INTO account (username) VALUES ('$value')";

 if (!mysql_query($sql)) {
 	die('Error: ' . mysql_error());
- }

mysql_close();
?>