code: def write_study(self, study_id, file_content, branch, author):
          
          gh_user = branch.split('_study_')[0]
          msg = "Update Study #%s via OpenTree API" % study_id
          return self.write_document(gh_user,
                                     study_id,
                                     file_content,
                                     branch,
                                     author,
                                     commit_msg=msg)
docs: Given a study_id, temporary filename of content, branch and auth_info
  
          Deprecated but needed until we merge api local-dep to master...