Using command for password

[TrayserCassa]

We work with yubikeys and gpg keys for our database passwords and it would be very kind if I can do something like this:

[[conn]]
type = "postgres"
user = "master"
host = "domain"
port = 5432
database = "master"
name = "master"
password_command = "gopass get master_postgres_key"

Then I don't need to save the passwords in a text file. If this is a good idea please let me know, then I can try (If I find the time) to add this by myself