Hi Jiro, you’re right about the missing
user in the
update_user_meta call. I’ve just added that fixed.
Regarding the var_dump, it’s not strange as the field registry (where all fields are stored) is structured like this:
object_type specific_type field 1 field 2
specific_type is post type. For terms, it’s
term and taxonomy. For users, as there’s no specific type, we use