How set dynamic database host names

[newbie14]

Current below is my settings.php

[ 'displayErrorDetails' => true, // set to false in production 'addContentLengthHeader' => false, // Allow the web server to send the content-length header // Renderer settings 'renderer' => [ 'template_path' => __DIR__ . '/../templates/', ], // Monolog settings 'logger' => [ 'name' => 'slim-app', 'path' => isset($_ENV['docker']) ? 'php://stdout' : __DIR__ . '/../logs/app.log', 'level' => \Monolog\Logger::DEBUG, ], "db" => [ "host" => "localhost", "dbname" => "***", "user" => "***1", "pass" => "***" ], ], ]; With this settings it works perfectly in the route when I called this e.g. $selectQueryResult1 = $this->db->prepare($selectQuery1) The issue now I will want to have many different database e.g. db1, db2; when I set new settings in the settings file I always get this error /var/www/html/apiv1/vendor/slim/slim/Slim/Container.php(172): Slim\Container->get('db1') How can I set and call those extra database settings?