Extract login error

app.py

@@ -20,21 +20,21 @@ HF_TOKEN = os.environ.get("HF_TOKEN")
 DOWNLOAD_FOLDER = "./downloads"
 OUTPUT_FOLDER = "./outputs"
 
+ERROR_LOGIN = "You must be logged in to use GGUF-my-repo."
+
 def create_folder(folder_name: str):
     if not os.path.exists(folder_name):
         print(f"Creating folder: {folder_name}")
         os.makedirs(folder_name)
 
-def is_valid_token(oauth_token):
+def validate_token(oauth_token):
     if oauth_token is None or oauth_token.token is None:
-        return False
+        raise gr.Error(ERROR_LOGIN)
 
     try:
         whoami(oauth_token.token)
     except Exception as e:
-        return False
-
-    return True
+        raise gr.Error(ERROR_LOGIN)
 
 # escape HTML for logging
 def escape(s: str) -> str:
@@ -329,9 +329,7 @@ def process_model(
     split_max_size: str | None,
     oauth_token: gr.OAuthToken | None,
 ):
-    # validate the oauth token
-    if is_valid_token(oauth_token) is False:
-        raise gr.Error("You must be logged in to use GGUF-my-repo")
+    validate_token(oauth_token)
 
     token = oauth_token.token
     print(f"Current working directory: {os.path.abspath(os.getcwd())}")
@@ -587,7 +585,7 @@ with gr.Blocks(css=css) as demo:
     #####
     # Layout
     #####
-    gr.Markdown("You must be logged in to use GGUF-my-repo.")
+    gr.Markdown(ERROR_LOGIN)
     gr.LoginButton(min_width=250)
 
     gr.HTML("<h1 style=\"text-aling:center;\">Create your own GGUF Quants!</h1>")