async _sessionSave( access_token ) {
		const { session } = this;
		const scope = expectedScopes.join( SEP_SCOPES_STORAGE );
		const date = new Date();
		setProperties( session, { access_token, scope, date } );

		await session.save();
	}
Update the auth record and save it
@param {string} access_token
@returns {Promise}