Proper Elixir Control Structure ?

gistfile1.ex

def authors(cd) do

      #Connect to the database.
        conn = RethinkDB.connect([host: "10.0.0.30", port: 28015])

        #Create ore Destroy the authors table.
        if cd == "create" do
          q = table_create("authors")
              |> run conn
        end

        if cd == "destroy" do
          q = table_drop("authors")
              |> run conn
        end

        results = inspect(q.data)
        IO.puts "#{results}"

  end