Sometimes a projects has a lot of secrets (more than 10). And its
cumbersome to write $(kama secrets fetch ...) with a lot of field
names.
I want to be able to just fetch all the fields from a given item
and then just use these with $(kamal extract NAME)
When fetched item is not a login, Bitwarden adapter raises NoMethodError
because the returned JSON does not have the login.password value.
Add a nicer error message for that case.
