connect function is returning undefined

https://github.com/andywer/pg-listen/blob/7dec032409ba2e77286d15e20d4b98c8af994a21/src/index.ts#L302-L306

Is there any reason why `connect()` is returning undefined not `dbClient`? Just wondering because I need to query db also and it doesn't make sense to create another connection to db. When `connect()` function would return `dbClient` it would be possible.