class_docstr: Authentication context within the scope of a single request.
  
  Auth providers are keyed within an `AuthContext` by arbitrary
  unique keys. It may often make sense for the key used for an
  auth provider to simply be that provider's type object.
docstr: Create an auth context with no registered providers.
  
  Returns:
    A new `AuthContext` value for which any call to `get` will
    fail with a `KeyError`.
docstr_tok: ["Create","an","auth","context","with","no","registered","providers",".","Returns",":","A","new","`","AuthContext","`","value","for","which","any","call","to","`","get","`","will","fail","with","a","`","KeyError","`","."]
code: def empty(cls):
      """Create an auth context with no registered providers.
  
      Returns:
        A new `AuthContext` value for which any call to `get` will
        fail with a `KeyError`.
      """
      # Use an empty dict for the environ. This is not a valid WSGI
      # environment, but it doesn't matter because it's never used.
      return cls({}, {})
  
imports: import abc
label_desc: Use image node_id 2 for calling the AuthContext obj's underlying member method code with example usage: obj.empty(cls) and returns: cls