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Why include the $wptreehouse_username on the Profile section?

Track: Creating a WP Plugin Video: Working with Forms in a WordPress Plugin Settings Page Why include the $wptreehouse_username on the Profile section? It doesn't appear until a username is entered because of the same code in the post boxes. Just wondering if it's redundant.

  <div class="meta-box-sortables">      

    <?php if( isset( $wptreehouse_username ) || $wptreehouse_username != '' ): ?>

                    <div class="postbox">

                        <h3><span>Mike the Frog's Profile</span></h3>
                        <div class="inside">

                            <p><img width="100%" class="wptreehouse-gravatar" src="<?php echo $plugin_url . '/images/mike-the-frog.png'; ?>" alt="Mike the Frog Gravatar"></p>

                            <ul class="wptreehouse-badges-and-points">                          

                                <li>Badges: <strong>200</strong></li>
                                <li>Points: <strong>10000</strong></li>


                        </div> <!-- .inside -->

                    </div> <!-- .postbox -->

                    <?php endif; ?>

                </div> <!-- .meta-box-sortables -->