Firebase realtime database: can't determine database rules for verifying google oauth email - firebase-realtime-database

Question

I can't figure out realtime database: firebase rules for verifying google oauth email.
In the rules, the only thing I have been able to use to see if the user is authenticated with google oauth is this:
{
"rules": {
".read": " auth.token.firebase.identities['google.com'][0] != '' "
}
}
And I want to also check if email is verified and is equal to "marcglassman#gmail.com"
I've tried to use:
auth.token.email
auth.token.firebase.identities[0].email
auth.token.authFields.email
and here is the reference doc I tried to use:
https://firebase.google.com/docs/reference/security/database/#authtoken
and here is the info I have avail:
const firebaseConsoleRealtimeDatabaseRulesPlaygroundAuthenticationPayload = {
"uid": "NUMBER_I_DONT_SHOW",
"token": {
"sub": "NUMBER_I_DONT_SHOW",
"authFields": {
"email": "marcglassman#gmail.com",
"email_verified": true,
"phone_number": "NUMBER_I_DONT_SHOW",
"name": "Marc Glassman"
},
"firebase": {
"sign_in_provider": "google.com"
}
}
};
const userInfoAfterFirebaseAuthJSClientAuthenticateUserWithGoogleLoginResult = {
"id":"NUMBER_I_DONT_SHOW",
"name":"Marc Glassman",
"provider":{
"displayName":"Marc Glassman",
"email":"marcglassman#gmail.com",
"phoneNumber":null,
"photoURL":"https://lh3.googleusercontent.com/a/AEdFTp7PL8PnsNNquMywC5DtEVa3ZxtAeznkfousQ_HZqHo=s96-c",
"providerId":"google.com",
"uid":"NUMBER_I_DONT_SHOW"
},
"providerName":"(google+)",
"uid":"NUMBER_I_DONT_SHOW"
}