Little cleanup: let huggingface_hub manage token retrieval (#21333)

* Let huggingface_hub manage token retrieval

* flake8

* code quality

* adapt in every PushToHubMixin children

* add explicit return type

src/transformers/tokenization_utils_base.py

@@ -2098,7 +2098,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin, PushToHubMixin):
         if push_to_hub:
             commit_message = kwargs.pop("commit_message", None)
             repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1])
-            repo_id, token = self._create_repo(repo_id, **kwargs)
+            repo_id = self._create_repo(repo_id, **kwargs)
             files_timestamps = self._get_files_timestamps(save_directory)
 
         special_tokens_map_file = os.path.join(
@@ -2177,7 +2177,11 @@ class PreTrainedTokenizerBase(SpecialTokensMixin, PushToHubMixin):
 
         if push_to_hub:
             self._upload_modified_files(
-                save_directory, repo_id, files_timestamps, commit_message=commit_message, token=token
+                save_directory,
+                repo_id,
+                files_timestamps,
+                commit_message=commit_message,
+                token=kwargs.get("use_auth_token"),
             )
 
         return save_files