mongodb的dbName没有被用到，登录验证失败

public function connect(array $config = [], $linkNum = 0)
    {
        if (!isset($this->links[$linkNum])) {
            if (empty($config)) {
                $config = $this->config;
            } else {
                $config = array_merge($this->config, $config);
            }

            $this->dbName  = $config['database'];
            $this->typeMap = $config['type_map'];

            if ($config['pk_convert_id'] && '_id' == $config['pk']) {
                $this->config['pk'] = 'id';
            }

            if (empty($config['dsn'])) {
                $config['dsn'] = 'mongodb://' . ($config['username'] ? "{$config['username']}" : '') . ($config['password'] ? ":{$config['password']}@" : '') . $config['hostname'] . ($config['hostport'] ? ":{$config['hostport']}" : '');
            }

            $startTime = microtime(true);

            $this->links[$linkNum] = new Manager($config['dsn'], $config['params']);

            if (!empty($config['trigger_sql'])) {
                // 记录数据库连接信息
                $this->trigger('CONNECT:[ UseTime:' . number_format(microtime(true) - $startTime, 6) . 's ] ' . $config['dsn']);
            }

        }

        return $this->links[$linkNum];
    }

Start at the PHP connect(array $config...) entry point shown in the issue, then trace how database and dsn are passed to MongoDB Manager. Confirm how the configured database should participate in authentication; the issue is resolved when MongoDB login succeeds with the configured dbName.