Updated sample config

src/main/java/no/bioforsk/vips/model/naerstadmodel/NaerstadModel.java

@@ -177,8 +177,10 @@ public class NaerstadModel extends I18nImpl implements Model{
     @Override
     public String getSampleConfig() {
         return  "{\n" +
-                "\t\"username\":\"example\",\n" +
-                "\t\"password\":\"example\",\n" +
+                "\t\"loginInfo\":{\n" +
+                "\t\t\"username\":\"example\",\n" +
+                "\t\t\"password\":\"example\"\n" +
+                "\t},\n" +
                 "\t\"modelId\":\"" + MODEL_ID.toString() + "\",\n" +
                 "\t\"configParameters\":{\n" +
                 "\t\t\"calculationStart\":\"2012-08-20T00:00:00+02:00\",\n" +