Get the metadata associated with the study in which the phylogeny was published.
show_metadata(study.id, curl = getCurlHandle())
The treebase study id (numbers only, specify in quotes)
if calling in series many times, call getCurlHandle() first and then pass the return value in here. avoids repeated handshakes with server.
if the tree is imported with search_treebase, then this is in tree$S.id