fix crash on empty newline

utils.py

@@ -195,7 +195,10 @@ def add_members(path, namespace_id, headers, url):
     """
     with open(path, "r") as f:
         for line in f.readlines():
-            parts = line.strip().split(":")
+            line = line.strip()
+            if line == "":
+                continue
+            parts = line.split(":")
             user = parts[0]
             path = f"{parts[-2]}{parts[-1]}"