There are a few issues:

1. pg-connection-string ConnectionOptions has database: string | null | undefined vs PoolConfig has database?: string; (which effectively means database: string | undefined).
2. pg-connection-string ConnectionOptions has ssl?: boolean | string vs PoolConfig has ssl?: boolean | ConnectionOptions
   • string is not present in PoolConfig
   • PoolConfig specifies tls.ConnectionOptions and pg-connection-string ConnectionOptions does not. (Note: Do not get confused here. There is pg-connection-string ConnectionOptions and node's tls ConnectionOptions