Keep default approach of Repo.get and Repo.get!

[alejandrodevs]

• Repo.get:
  https://hexdocs.pm/ecto/Ecto.Repo.html#c:get/3
  By default an ecto repo returns nil if there is not results when using Repo.get and using couchx I'm getting a couchdb error.

• Repo.get!
  In the other hand, when using Repo.get! ecto repo raises Ecto.NoResultsError and using couchx I'm getting a couchdb error.
  https://hexdocs.pm/ecto/Ecto.Repo.html#c:get!/3

What do you think? IMO it should keep the standard.