Since PostgreSQL password authentication with SCRAM-SHA-256 method is available: https://www.postgresql.org/docs/10/auth-methods.html.

Currently this library fails to connect when trying to authenticate to a server that enforces scram-sha-256 method with: unknown authentication response: 10

Note: I'm currently having this problem with a project that vendors this library, but code at https://github.com/lib/pq/blob/master/conn.go#L1135 also lacks this authentication method.