Generate a link for google oauth for user to authenticate on adkweb ui

Hi, I need to prompt user to click on a google oauth link to authenticate so that the client token can be captured for sending email using gmail.

i used chatgpt which helped generate this code but i don't get any link on ADK Web UI.

return {
"type": "action",
"action": {
"type": "open_url",
"url": auth_url_with_state,
"label": f"Authorize sending email to {recipient_email}"
},
"message": (
f"I am ready to send the email to **{recipient_email}**.\n"
f"Please click the button above to authorize."
)
}

I also have a method oauth2callback for returnURL.

any suggestions?