本身逻辑只是个api，但是官方不提供php的sdk 扎心了老铁，这下php 狗都不用了，主要麻烦的是如何获取access_token，代码如下

    protected function get_jwt(): string
    {
        $header = [
            'alg' => 'RS256',
            'typ' => 'JWT',
            'kid' => $this->kid
        ];
        $payload = [
            'iss' => $this->iss,
            'aud' => $this->aud,
            'iat' => time(),
            'exp' => time() + $this->duration * 60,
            'jti' => Str::random(32),
        ];
        $encodedHeader = $this->base64url_encode(json_encode($header));
        $encodedPayload = $this->base64url_encode(json_encode($payload));
        $signature = '';
        $data = $encodedHeader . '.' . $encodedPayload;

        openssl_sign($data, $signature, Storage::get('private_key.pem'), 'sha256WithRSAEncryption');
        $encodeSignature = $this->base64url_encode($signature);
        return $encodedHeader . '.' . $encodedPayload . '.' . $encodeSignature;
    }

    private function base64url_encode($data)
    {
        return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
    }