Use a bare-bones client and the command you need to make an API call.

import { GroupServiceClient, JoinGroupCommand } from "@rivet-gg/group"; // ES Modules import
// const { GroupServiceClient, JoinGroupCommand } = require("@rivet-gg/group"); // CommonJS import
const client = new GroupServiceClient(config);
const command = new JoinGroupCommand(input);
const response = await client.send(command);

JoinGroupCommandInput for command's input shape.

JoinGroupCommandOutput for command's response shape.

config for GroupServiceClient's config shape.