Absinthe is a library in Elixir that allows GraphQL APIs to be built
https://hexdocs.pm/absinthe/start.html#content
https://www.howtographql.com/graphql-elixir/0-introduction/
https://github.com/absinthe-graphql/absinthe
https://github.com/absinthe-graphql/absinthe_tutorial
This example uses Postgres as the DB