docs: def get_all_users(path_prefix='/', region=None, key=None, keyid=None,
                   profile=None):
      '''
      Get and return all IAM user details, starting at the optional path.
  
      .. versionadded:: 2016.3.0
  
      CLI Example:
  
          salt-call boto_iam.get_all_users
      '''
      conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
      if not conn:
          return None
      _users = conn.get_all_users(path_prefix=path_prefix)
      users = _users.list_users_response.list_users_result.users
      marker = getattr(
          _users.list_users_response.list_users_result, 'marker', None
      )
      while marker:
          _users = conn.get_all_users(path_prefix=path_prefix, marker=marker)
          users = users + _users.list_users_response.list_users_result.users
          marker = getattr(
              _users.list_users_response.list_users_result, 'marker', None
          )
      return users