I was using the wrong filter name by adding an ‘s’ in manage_users_custom_columns. The correct filter name is without ‘s’ : manage_users_custom_column.
This was pointed out in the comments by @mmm.
I was using the wrong filter name by adding an ‘s’ in manage_users_custom_columns. The correct filter name is without ‘s’ : manage_users_custom_column.
This was pointed out in the comments by @mmm.