Generate LiveKit access tokens and create rooms via the Server API

Steps

1. Install the LiveKit Server SDK for your language (e.g., livekit-server-sdk for Node.js) and store your API key and API secret from the LiveKit Cloud dashboard or your self-hosted config as environment variables.
2. Generate an access token by constructing an AccessToken with your API key and secret, call addGrant() with VideoGrant fields such as roomJoin: true, room: 'your-room-name', canPublish: true, canSubscribe: true, then call toJwt() to produce the signed JWT.
3. Optionally pre-create the room server-side via RoomServiceClient.createRoom(), passing name, emptyTimeout (seconds before an empty room is deleted), and maxParticipants to enforce limits.
4. Pass the JWT to your frontend client; the client connects by calling room.connect(livekitUrl, token) where livekitUrl is your WebSocket endpoint (e.g., wss://your-project.livekit.cloud).
5. Use RoomServiceClient methods such as listParticipants(), removeParticipant(), and mutePublishedTrack() for server-side room management without requiring a client connection.
6. Tokens expire after the duration set at creation (default 6 hours); refresh tokens before expiry or implement a token refresh webhook to avoid session drops.