Tribe private custom fields.php

function cmdm_private_event( $content )
{
    global $post;
    $cmdm_content = '';
    $cmdm_private = false;
    $cmdmc_post_types = array( 'tribe_events' );
   
    if ( function_exists( 'tribe_get_custom_fields' ) )
    {
        $additional_fields = tribe_get_custom_fields();
        if ( isset($additional_fields['Privado']) && $additional_fields['Privado'] == 'Si' ) $cmdm_private = true ;
    }

    if ( in_array( $post->post_type, $cmdmc_post_types ) && $cmdm_private && !is_user_logged_in() )
    {
        $cmdm_content .= '
       
        <div class="et_pb_module et_pb_text et_pb_text_1  et_pb_text_align_left et_pb_bg_layout_light">
        <div class="et_pb_text_inner">
       
            <div style="width: auto; margin-bottom: 20px;">
            <h2 style="margin-bottom: 0; font-size: 1.5em;">' . __('Private event','quofitness') . '</h2>
            <p>' . __('Please, login in order to attend this event.','quofitness') . '</p>
            </div>
           
            <div style="width: auto; border-bottom: 1px solid #cc0000; border-top: 1px solid #cc0000;">
            <div id="login-code-container" style="margin: 20px auto; padding: 20px 20px 20px; max-width: 360px; background-color: #eee; border: 1px solid #ccc;">
                <form name="loginform" id="loginform" action="/wp-login.php" method="post">
                <input type="hidden" name="redirect_to" value="' . get_permalink( $post->ID ) . '">
                <p class="login-username"><label for="user_login">' . __('Username or email','quofitness') . '</label>
                    <input type="text" name="log" id="user_login" class="et_pb_contact_message input" value="" size="20"></p>
                <p class="login-password"><label for="user_pass">' . __('Password','quofitness') . '</label>
                    <input type="password" name="pwd" id="user_pass" class="et_pb_contact_message input" value="" size="20"></p>
                <p class="login-submit">
                    <input type="submit" name="wp-submit" id="wp-submit" class="et_pb_contact_submit et_pb_button" value="' . __('Login','quofitness') . '"></p>
                </form>
            </div>
            </div>
       
        </div>
        </div>
        ';
       
        return $cmdm_content;
       
    }
    else
    {
        return $content;
    }
   
}

add_filter( 'the_content', 'cmdm_private_event' );