User authentication via JWT token in NATS WebSocket

Question

I have authorization service that giving JWT tokens with HS256 encryption (by hmac secret key). I want to configure NATS WebSocket for authenticate users via this tokens.

I have tried NATS resolver with URL but it only tried to get accounts in my case and doesn't anything else.

NATS test config:

websocket {
    port: 8085
    no_tls: true
}

resolver: url(http://nats-auth-checker/jwt/v1/accounts/)

How to configure users authentication via external JWT tokens in NATS WebSocket?
And I have doubts: is it a normal practice to use NATS as WebSocket gateway for frontend?