feat: validates config path before loading login info

Adds a check to ensure the provided configuration file path exists and is a valid file before attempting to load login information.

main.py

@@ -36,7 +36,12 @@ def display_usage():
 
 
 def main(opt):
-    login_info = LoginInfo(Path(opt.config_path))
+    config_path = Path(opt.config_path)
+    if not config_path.exists() or not config_path.is_file():
+        print(f"Error: Config path '{config_path}' does not exist or is not a file.")
+        return
+
+    login_info = LoginInfo(config_path)
 
     driver = get_driver()
     keep_login_status(driver, login_info)