docs: def index(credentials = None):
      """Get list of projects or shortcut to other functionality"""
  
      #handle shortcut
      shortcutresponse = entryshortcut(credentials)
      if shortcutresponse is not None:
          return shortcutresponse
  
      projects = []
      user, oauth_access_token = parsecredentials(credentials)
      totalsize = 0.0
      if settings.LISTPROJECTS:
          projects, totalsize = getprojects(user)
  
      errors = "no"
      errormsg = ""
  
      corpora = CLAMService.corpusindex()
  
      #pylint: disable=bad-continuation
      return withheaders(flask.make_response(flask.render_template('response.xml',
              version=VERSION,
              system_id=settings.SYSTEM_ID,
              system_name=settings.SYSTEM_NAME,
              system_description=settings.SYSTEM_DESCRIPTION,
              system_author=settings.SYSTEM_AUTHOR,
              system_version=settings.SYSTEM_VERSION,
              system_email=settings.SYSTEM_EMAIL,
              user=user,
              project=None,
              url=getrooturl(),
              statuscode=-1,
              statusmessage="",
              statuslog=[],
              completion=0,
              errors=errors,
              errormsg=errormsg,
              parameterdata=settings.PARAMETERS,
              inputsources=corpora,
              outputpaths=None,
              inputpaths=None,
              profiles=settings.PROFILES,
              datafile=None,
              projects=projects,
              totalsize=totalsize,
              actions=settings.ACTIONS,
              disableinterface=not settings.ENABLEWEBAPP,
              info=False,
              accesstoken=None,
              interfaceoptions=settings.INTERFACEOPTIONS,
              customhtml=settings.CUSTOMHTML_INDEX,
              allow_origin=settings.ALLOW_ORIGIN,
              oauth_access_token=oauth_encrypt(oauth_access_token),
              auth_type=auth_type()
              )), headers={'allow_origin':settings.ALLOW_ORIGIN})