Update app.py

app.py

@@ -9,7 +9,7 @@ st.title("Cohere Chat UI")
 if "api_key" not in st.session_state:
     api_key = st.text_input("Enter your API Key", type="password")
     if api_key:
-        if isascii(api_key):
+        if api_key.isascii():
             st.session_state.api_key = api_key
             client = cohere.Client(api_key=api_key)
             st.rerun()
@@ -183,7 +183,7 @@ with st.sidebar:
     st.header("Change API Key")
     new_api_key = st.text_input("Enter new API Key", type="password")
     if st.button("Update API Key"):
-        if new_api_key and isascii(new_api_key):
+        if new_api_key and new_api_key.isascii():
             st.session_state.api_key = new_api_key
             client = cohere.Client(api_key=new_api_key)
             st.success("API Key updated successfully!")