human
Solve the following python programming problem given the following code:
def auth_required(self, view_func) : 
    "Decorator that provides an access to view function for
        authenticated users only.

        Note that we don't run authentication when `HAWK_ENABLED` is `False`.

        " 
    @ wraps (view_func) 
    def wrapped_view_func(* args, **kwargs) : 
        if current_app.config ['HAWK_ENABLED'] : 
            if (current_app.config ['HAWK_ALLOW_COOKIE_AUTH'] and session) : 
                self._auth_by_cookie () 
else : 
                self._auth_by_signature () 
return view_func (* args, ** kwargs) 
return view_func 

    
    

    Fix the buggy line: return view_func
assistant
#Here is Python code to fix the buggy line: return view_func
.

return def wrapped_view_func(