private static function setClient()
    {
        if (self::$client === null) {
            self::$client = new Client([
                'base_uri'  => self::$environment,
                'timeout'   => self::TIMEOUT,
                'verify'    => self::VERIFY,
            ]);
        }
    }
private static function setClient()
    {
        if (self::$client === null) {
            self::$client = new Client([
                'base_uri'  => self::$environment,
                'timeout'   => self::TIMEOUT,
                'verify'    => self::VERIFY,
            ]);
        }
    }
private static function setClient ( ) { if ( self :: $ client === null ) { self :: $ client = new Client ( [ 'base_uri' => self :: $ environment , 'timeout' => self :: TIMEOUT , 'verify' => self :: VERIFY , ] ) ; } }
Set the Guzzle client
Set the Guzzle client