Customer.js

try {
  //...first half of function

  const { customerId, customerToken, channelId, streamApiKey } = await response.json();
  chatClient = new StreamChat(streamApiKey);

  await chatClient.setUser(
    {
      id: customerId,
      name: firstName,
    },
    customerToken,
  );

  const channel = chatClient.channel('messaging', channelId, {
    name: `Chat with ${customerId}`
  });

  await channel.watch;
  setChannel(channel);

} catch (e) {
  console.error(e, e.error);
}