public function setAuthToken($tenantKey, $authToken, $authTokenExpiration)
    {
        if ($this->tenantTokens[$tenantKey] == null) {
            $this->tenantTokens[$tenantKey] = array();
        }
        $this->tenantTokens[$tenantKey]['authToken'] = $authToken;
        $this->tenantTokens[$tenantKey]['authTokenExpiration'] = $authTokenExpiration;
    }