template-query-example.php

<?php
  $user_id = get_current_user_id();

  if ( ! $user_id ) {
    return; // Just return if user is not logged in.
  }

  $query = array(
    'posts_per_page' => '-1',
    'author' => $user_id,
    'post_type' => 'action_plan'
  );

  $posts = new WP_Query( $query );
?>

<?php while ( $posts->have_posts() ) : $posts->the_post(); ?>

  <?php the_content(); ?>

<?php endwhile; ?>