Warn vendors if they dont have some custom field set

gistfile1.txt

/* This will warn a vendor if some magical meta key isnt set.  Change it to the one you need in the code below: */

// Get the users meta key we want to check.
$the_meta_key =   get_user_meta( get_current_user_id(), 'CHANGEME', true ); // CHANGE CHANGEME TO THE META KEY NAME YOU WANT TO CHECK.

// DEBUG STUFF.  UNCOMMENT TO CHECK STUFF.
// echo '<pre>THE META KEY IS: ' . $the_meta_key . '</pre>';

// Check if meta key is set
if (!isset($the_meta_key)) {
  echo '<h3>Oh no!  Your custom meta key isnt set!  Your admin should change this message to be useful!';
}