code: def lcopt_bw2_autosetup(ei_username=None, ei_password=None, write_config=None, ecoinvent_version='3.3', ecoinvent_system_model = "cutoff", overwrite=False):  
      ei_name = "Ecoinvent{}_{}_{}".format(*ecoinvent_version.split('.'), ecoinvent_system_model)
      config = check_for_config()
      if config is None:
          config = DEFAULT_CONFIG
          with open(storage.config_file, "w") as cfg:
              yaml.dump(config, cfg, default_flow_style=False)
      store_option = storage.project_type
      if store_option == 'single':
          project_name = storage.single_project_name
          if bw2_project_exists(project_name):
              bw2.projects.set_current(project_name)
              if ei_name in bw2.databases and overwrite == False:
                  return True
      else:
          project_name = DEFAULT_PROJECT_STEM + ei_name
          if bw2_project_exists(project_name):
              if overwrite:                                           
                  bw2.projects.delete_project(name=project_name, delete_dir=True)
      auto_ecoinvent = partial(eidl.get_ecoinvent,db_name=ei_name, auto_write=True, version=ecoinvent_version, system_model=ecoinvent_system_model)
      if config is not None:
          if "ecoinvent" in config:
              if ei_username is None:
                  ei_username = config['ecoinvent'].get('username')
              if ei_password is None:
                  ei_password = config['ecoinvent'].get('password')
              write_config = False
      if ei_username is None:
          ei_username = input('ecoinvent username: ')
      if ei_password is None:
          ei_password = getpass.getpass('ecoinvent password: ')
      if write_config is None:
          write_config = input('store username and password on this computer? y/[n]') in ['y', 'Y', 'yes', 'YES', 'Yes']
      if write_config:
          config['ecoinvent'] = {
              'username': ei_username,
              'password': ei_password
          }
          with open(storage.config_file, "w") as cfg:
              yaml.dump(config, cfg, default_flow_style=False)
      if store_option == 'single':
          if bw2_project_exists(project_name):
              bw2.projects.set_current(project_name)
          else:
              if not bw2_project_exists(DEFAULT_BIOSPHERE_PROJECT):
                  bw2.projects.set_current(project_name)
                  bw2.bw2setup()
              else:
                  bw2.projects.set_current(DEFAULT_BIOSPHERE_PROJECT)
                  bw2.create_core_migrations()
                  bw2.projects.copy_project(project_name, switch=True)
      else:
          if not bw2_project_exists(DEFAULT_BIOSPHERE_PROJECT):
              lcopt_biosphere_setup()
          bw2.projects.set_current(DEFAULT_BIOSPHERE_PROJECT)
          bw2.create_core_migrations()
          bw2.projects.copy_project(project_name, switch=True)
      if ei_username is not None and ei_password is not None:
          auto_ecoinvent(username=ei_username, password=ei_password)
      else:
          auto_ecoinvent()
      write_search_index(project_name, ei_name, overwrite=overwrite)
      return True