try getting creds as json

app.py

@@ -72,8 +72,12 @@ def get_credentials():
         temp.write(creds_json_str) # write in json format
         temp_filename = temp.name
         return temp_filename
+def get_creds_json():
+    creds_json_str = os.getenv("IMAGEN")
+    return json.loads(creds_json_str)
+
 # pass
-os.environ["GOOGLE_APPLICATION_CREDENTIALS"]= get_credentials()
+os.environ["GOOGLE_APPLICATION_CREDENTIALS"]= get_creds_json()
 
 # pick a random challenge
 def get_challenge():
@@ -216,7 +220,7 @@ with gr.Blocks(css=css) as demo:
 
     gr.Markdown("# <center>Prompt de Resistance Vertex Imagen</center>")
 
-    pw = gr.Textbox(label="Password", type="password", placeholder="Enter the password to unlock the service", value="REBEL.pier6moment")
+    pw = gr.Textbox(label="Password", type="password", placeholder="Enter the password to unlock the service")
 
     #instructions
     with gr.Accordion("Instructions & Tips",label="instructions",open=False):