update with credentiale file creation

utils.py

@@ -1,8 +1,21 @@
 import os
 from google.cloud import vision
 import re
+import json
+import tempfile
 ##
-os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 'data/ocr_vision_token.json'
+
+def get_credentials():
+    creds_json_str = os.getenv("cloud_vision")
+
+    #create temporale file
+    with tempfile.NamedTemporaryFile(mode="w+",delete=False, suffix=".json") as temp:
+        temp.write(creds_json_str) #write the content in json format
+        temp_filename = temp.name
+        
+    return temp_filename
+    
+os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = get_credentials()
 
 ##
 def info_new_cni(donnees):