Add app file

app.py

@@ -19,7 +19,14 @@ from google.cloud import aiplatform
 from google.protobuf import json_format
 from google.protobuf.struct_pb2 import Value
 import os
-os.environ['GOOGLE_APPLICATION_CREDENTIALS']=os.environ['API_KEY']
+
+content = os.environ['API_KEY']
+
+with open('key.json', 'w') as file:
+    file.write(content)
+
+
+os.environ['GOOGLE_APPLICATION_CREDENTIALS']= './key.json'
 def predict_custom_trained_model_sample(
     project: str,
     endpoint_id: str,