Hi Joven, For Web flow type applications, the refresh token is only returned if the access_type HTTP query parameter is set to "offline" when you direct the user to Google's OAuth 2.0 server. I see that you have set this parameter. Could you check if this parameter is being passed correctly in the authorization URL? Could you check if a value is returned for "$authToken['refresh_token'];" when you authorize for the first time?
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