update utile

utils.py

@@ -12,7 +12,7 @@ import tempfile
 def getcredentials():
     secret_key_credential = os.getenv("cloud_vision")
 
-    with tempfile.NamedTemporaryFile(mode='w+', delete=True,format=".json") as temp_file:
+    with tempfile.NamedTemporaryFile(mode='w+', delete= True, suffix=".json") as temp_file:
         json_file = temp_file.write(secret_key_credential)
 
     tempfile_name = json_file.name