Warn users to login to HuggingFace (#645)

* added warning if user is not logged in HF

* updated doc to suggest logging in to HF

scripts/finetune.py

@@ -7,6 +7,7 @@ import transformers
 
 from axolotl.cli import (
     check_accelerate_default_config,
+    check_user_token,
     do_inference,
     do_merge_lora,
     load_cfg,
@@ -31,6 +32,7 @@ def do_cli(config: Path = Path("examples/"), **kwargs):
     )
     parsed_cfg = load_cfg(config, **kwargs)
     check_accelerate_default_config()
+    check_user_token()
     parser = transformers.HfArgumentParser((TrainerCliArgs))
     parsed_cli_args, _ = parser.parse_args_into_dataclasses(
         return_remaining_strings=True