adding gcp env variable

app.py

@@ -28,6 +28,8 @@ from vertexai.generative_models import GenerativeModel, Part,Image
 import vertexai.preview.generative_models as generative_models
 import time
 import typing_extensions as typing
+import os
+os.environ["GOOGLE_APPLICATION_CREDENTIALS"]
 vertexai.init(project="wubble2024", location="asia-southeast1")
 torch.set_default_device("cpu")
 # Initialize the text-to-image pipeline