OnlineSubsystemGoogle LoginURL is empty

I am trying to go through google authentication using OnlineSubsystem Google. However, when ShowLoginUI is called from the ExternalUI interface of OnlineSubsystemGoogle, the LoginURL is empty and the Login UI is not exposed.

Below are the settings in my WindowsEngine.ini file.

[OnlineSubsystemGoogle]
bEnabled=true
ClientId=“CLIENTID_CONSOLE”
ClientSecret=“CLIENTID_SECRET_CONSOLE”

[OnlineSubsystemGoogle.OnlineIdentityGoogle]
+ScopeFields=“https://www.googleapis.com/auth/userinfo.email
+ScopeFields=“https://www.googleapis.com/auth/userinfo.profile

Even after adding LoginUrl=“” to that setting, it’s still empty. please help me.