Question about ip camera rest api

OpenVidu v2 How to implement?
1

Hello, I have a question while publishing ip camera with openvidu.
I write this code according to IP cameras example and openvidu server using docker run -p 4443:4443 --rm -e OPENVIDU_SECRET=MY_SECRET openvidu/openvidu-server-kms:2.15.0

return new Promise((resolve, reject) => {
            const body = JSON.stringify({ "rtspUri": rtspUri,
                                            "adaptativeBitrate": true,
                                            "onlyPlayWithSubscribers": true
                                        });
            const options = {
                headers: new HttpHeaders({
                    'Authorization': 'Basic ' + btoa('OPENVIDUAPP:' + this.MY_SECRET),
                    'Content-Type': 'application/json',
                    'Access-Control-Allow-Origin': "*"
                }),
            };
            return this.http
                .post<any>(this.OPENVIDU_SERVER_URL + '/api/sessions/' + sessionId + '/connection', body, options)
                .pipe(
                    catchError((error) => {
                        error.status === 409 ? resolve(sessionId) : reject(error);
                        return observableThrowError(error);
                    }),
                )
                .subscribe((response) => {
                    resolve(response.id);
                });
        });

The result I got hew hours ago is this, at this time, it can get an object.
Screenshot_2020-08-17 200817

But this time, it returns an error.
12312

It is difficult because it’s my first time doing openvidu and ionic. I’m sorry…