$configuration=array(
"client_id" => "XXXXXXXXXXXXXXXXXX",
"client_secret" => "XXXXXXXXXXXXXXX",
"redirect_uri" => "XXXXXXXXXXXXXXX",
"currentUserEmail" => "XXXXXXXXXXX",
"token_persistence_path" => __DIR__ . "/TokenStorage",
"access_type" => "offline",
"apiVersion"=>"v2"
);