Can't access SyncGoTrueClient.api or SyncGoTrueAPI

[ThibClnt]

I am managing sessions from server. As the documentation specifies, I want to use api.sign_out method:

For server-side management, you can revoke all refresh tokens for a user by
passing a user's JWT through to `api.sign_out`.

But it seems like my SyncGoTrueClient has no api attribute :

>>> from supabase_auth import SyncGoTrueClient
>>> client = SyncGoTrueClient(url='http://127.0.0.1:54321',headers=headers)
>>> type(client)
<class 'supabase_auth._sync.gotrue_client.SyncGoTrueClient'>
>>> client.api
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'SyncGoTrueClient' object has no attribute 'api'

I use the last version of supabase_auth:

I don't undestand why I have access to neither SyncGoTrueClient api attribute nor to SyncGoTrueAPI object. Anyone have an idea why ?
Thanks.