public async Task <DbConnection> OpenAsync()
{
if (string.IsNullOrEmpty(_connectionString) && _connectionStringFactory == null)
{
throw new ArgumentNullException($"Please construct {nameof(SqliteConnectionFactory)} with a connection string or factory to use parameterless OpenAsync");
}
var connectionString = string.IsNullOrEmpty(_connectionString) ? await _connectionStringFactory.GetConnectionStringAsync() : _connectionString;
return(await OpenAsync(connectionString));
}