Thanks for the info! I think I may still be doing something wrong, but here is what I have so far
<?php
$field_name = "author_header";
$post_id = "user_{$user_id}";
$publisher_photo = get_field($field_name, $post_id);
$image_src = wp_get_attachment_image_src($publisher_photo);
echo '<img class="grayscale" src="'. $image_src[0] .'" />';
?>
Any advise? thanks!
Here is the working solution
<?php
$user_id = $user->ID;
$publisher_photo = get_the_author_meta('author_header', $user_id);
$image_src = wp_get_attachment_image_src($publisher_photo);
echo '<img src="'. $image_src[0] .'" />';
?>
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