Seleccionar idstudy segun identifierfield para redirect

lib/api_web/controllers/redirect.ex

@@ -79,13 +79,13 @@ defmodule ApiWeb.Redirect do
       query =
         if studyidentifier == "IDSTUDY" do
           from s in "study",
-            where: s.accessionnumber == ^accessionnumber,
+            where: s.accessionnumber == ^accession,
             select: %{
               idstudy: s.idstudy
             }
         else
           from s in "study",
-            where: s.accessionnumber == ^accessionnumber,
+            where: s.accessionnumber == ^accession,
             select: %{
               idstudy: s.idstudy
             }