Update example.

Author: ParagEkbote

comet/comet_callback.py

@@ -16,6 +16,7 @@
 """
 
 import comet_ml
+from comet_ml import login
 import optuna
 from optuna_integration.comet import CometCallback
 
@@ -27,6 +28,8 @@
 from sklearn.model_selection import train_test_split
 
 
+login()
+
 # Start the experiment using comet_ml.start()
 experiment = comet_ml.start()