TokenController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use GetStream\StreamChat\Client as StreamClient;

class TokenController extends Controller
{
  public function generate(Request $request)
  {
    $client = new StreamClient(
      env('MIX_STREAM_API_KEY'),
      env('MIX_STREAM_API_SECRET'),
      null,
      null,
      9
    );

    return response()->json([
      'token' => $client->createToken($request->username)
    ]);
  }
}