Tryina use Schema

index.php

<?php

    use Illuminate\Database\Schema\Blueprint;

    use \Psr\Http\Message\ServerRequestInterface as Request;
    use \Psr\Http\Message\ResponseInterface as Response;

    global $app;
    
    $app->get('/install', function (Request $request, Response $response, $args) {
        Schema::create('activations', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->string('code');
            $table->boolean('completed')->default(0);
            $table->timestamp('completed_at')->nullable();
            $table->timestamps();

            $table->engine = 'InnoDB';
        });
    });