Handles turning data into claims when using the with_claims function in the Joken module.

There is a default implementation for maps.

Implementing to_claims expects a map to be returned.

Structs can derive from Joken.Claims to be used as claims

defmodule FullDerive do
  @derive Joken.Claims
  defstruct [:a, :b, :c]
end

derive supports using the only or exclude option as well