diff --git a/collections/IRIS GW (Gateway) REST API (v1)/.env.template b/collections/IRIS GW (Gateway) REST API (v1)/.env.template
index e4b23d3..e48ad6f 100644
--- a/collections/IRIS GW (Gateway) REST API (v1)/.env.template	
+++ b/collections/IRIS GW (Gateway) REST API (v1)/.env.template	
@@ -1 +1,2 @@
-IrisApiPassword=
\ No newline at end of file
+IrisApiPassword=
+IrisApiUsername=
\ No newline at end of file
diff --git a/collections/IRIS GW (Gateway) REST API (v1)/environments/IRIS - Prod.yml b/collections/IRIS GW (Gateway) REST API (v1)/environments/IRIS - Prod.yml
index 401dde2..e63a503 100644
--- a/collections/IRIS GW (Gateway) REST API (v1)/environments/IRIS - Prod.yml	
+++ b/collections/IRIS GW (Gateway) REST API (v1)/environments/IRIS - Prod.yml	
@@ -4,6 +4,6 @@ variables:
   - name: IrisApiUrl
     value: https://air.unipr.it/gw/rest/api
   - name: IrisApiUsername
-    value: restentities
+    value: "{{process.env.IrisApiUsername}}"
   - name: IrisApiPassword
     value: "{{process.env.IrisApiPassword}}"
diff --git a/collections/IRIS GW (Gateway) REST API (v1)/opencollection.yml b/collections/IRIS GW (Gateway) REST API (v1)/opencollection.yml
index 834bc46..723d471 100644
--- a/collections/IRIS GW (Gateway) REST API (v1)/opencollection.yml	
+++ b/collections/IRIS GW (Gateway) REST API (v1)/opencollection.yml	
@@ -15,6 +15,9 @@ config:
       bypassProxy: ""
 
 request:
+  headers:
+    - name: Accept
+      value: "*/*"
   auth:
     type: basic
     username: "{{IrisApiUsername}}"