QSslSocket::QueryPeer. Will connection encrypted with public key of the quered certificate?

[BrMisha]

Hello!
I'm using QWebSocketServer to accept connections from clients using their certificates:

QList<QSslCertificate>	usersCertificates; // add here certificates of all users.

QSslConfiguration	sslConfiguration;
sslConfiguration.setPeerVerifyMode(QSslSocket::VerifyPeer);
sslConfiguration.setCaCertificates(usersCertificates);
server.setSslConfiguration(sslConfiguration);

So, i'm sure that connection established with verified clients. But in this case i need to set ssl settings to server every time i add new user.
Can i use QSslSocket::QueryPeer and check certificate is allowed after establish connection? For example:

QList<QSslCertificate>	usersCertificates; // add here certificates of all users.

QSslConfiguration	sslConfiguration;
sslConfiguration.setPeerVerifyMode(QSslSocket::QueryPeer);
server.setSslConfiguration(sslConfiguration);

// ... got new connection
auto socket = server.nextPendingConnection()
auto certificate = socket->sslConfiguration().peerCertificate()
if (usersCertificates.contains(certificate)) {
 //user is verified
}

Is it safety? Will connection encrypted with public key of user?