Want to change the avatar for the user and the bot withs custom .png file or icon.

Here is my code.
I tried to give the path of the image but it shows blank image in the UI.
Also tried bot_img = Image.open(image.png) and the give avatat = bot_img but didnt work.

if st.session_state.get('generated'):
    with response_container:
        for i in range(len(st.session_state['generated'])):
            message(st.session_state["past"][i], is_user=True, key=f'{i}_user', avatar_style= "identicon")
            if isinstance(st.session_state["generated"][i], pd.DataFrame):
                st.write(st.session_state["generated"][i])
            else:
                message(st.session_state["generated"][i], key=f'{i}_ai', avatar_style="bottts")