Update httpx_auth/_oauth2/resource_owner_password.py

Co-authored-by: Colin Bounouar <Colin-b@users.noreply.github.com>

httpx_auth/_oauth2/resource_owner_password.py

@@ -41,7 +41,7 @@ def __init__(self, token_url: str, username: str, password: str, **kwargs):
         Use it to provide a custom proxying rule for instance.
         :param kwargs: all additional authorization parameters that should be put as body parameters in the token URL.
         """
-        super().__init__()
+        OAuth2BaseAuth.__init__(self)
 
         self.token_url = token_url
         if not self.token_url: