docs: def setup(interactive, not_relative, dry_run, reset, root_dir, testuser):
      """This will help you to setup cellpy."""
  
      click.echo("[cellpy] (setup)")
  
      # generate variables
      init_filename = create_custom_init_filename()
      userdir, dst_file = get_user_dir_and_dst(init_filename)
  
      if testuser:
          if not root_dir:
              root_dir = os.getcwd()
  
          click.echo(f"[cellpy] (setup) DEV-MODE testuser: {testuser}")
          init_filename = create_custom_init_filename(testuser)
          userdir = root_dir
          dst_file = get_dst_file(userdir, init_filename)
          click.echo(f"[cellpy] (setup) DEV-MODE userdir: {userdir}")
          click.echo(f"[cellpy] (setup) DEV-MODE dst_file: {dst_file}")
  
      if not pathlib.Path(dst_file).is_file():
          reset = True
  
      if interactive:
          click.echo(" interactive mode ".center(80, "-"))
          _update_paths(root_dir, not not_relative, dry_run=dry_run, reset=reset)
          _write_config_file(
              userdir, dst_file,
              init_filename, dry_run,
          )
          _check()
  
      else:
          _write_config_file(userdir, dst_file, init_filename, dry_run)
          _check()