// Set up the authentication
// For Stargate OSS: Create a table based auth token Stargate/Cassandra
// authentication using the default C* username and password
const credentials = new StargateTableBasedToken(
  {authEndpoint: auth_endpoint,
    username: username,
    password: password
  }
);

// Create the gRPC client
// For Stargate OSS: passing it the address of the gRPC endpoint
const stargateClient = new StargateClient(stargate_uri, grpc.credentials.createInsecure());

// Create a promisified version of the client, so we don't need to use callbacks
const promisifiedClient = promisifyStargateClient(stargateClient);

// For Stargate OSS: generate authentication metadata that is passed in the executeQuery and executeBatch statements
const authenticationMetadata = await credentials.generateMetadata({service_url: auth_endpoint});

// For Stargate OSS: SELECT the data to read from the table
const query = new Query();
const queryString = 'SELECT firstname, lastname FROM test.users;'
// Set the CQL statement using the string defined in the last line
query.setCql(queryString);

// For Stargate OSS: execute the query statement
const response = await promisifiedClient.executeQuery(
  query,
  authenticationMetadata
);