a named list with at most two elements. It will always
contain a list, named records,
of objects of type project_summary_response. If the
call to get_projects_user_contributing() was made with a non-null
limit parameter, and if further pages remain for retrieval, then
the list will also contain a single-element character
vector, named next_page_token,
with the token to use in a subsequent call to get the next page.