Cant get blog name with get_option

You need access to the property of $username to get the name

$user = wp_get_current_user();
$username= $user->display_name;

Get option method will return the name of the site you have set in setting -> general options

$url = get_option( 'blogname');

If you need home URL then

$url = get_option( 'home' );

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