diff --git a/service/api_pods_podid_func.py b/service/api_pods_podid_func.py
index 1d86922..1a05379 100644
--- a/service/api_pods_podid_func.py
+++ b/service/api_pods_podid_func.py
@@ -272,13 +272,13 @@ def is_logged_in(cookies):
     return False, None, None
 
 
-def get_username(token):
+def get_username(tapis_domain, token):
     """
     Validate a Tapis JWT, `token`, and resolve it to a username.
     """
     headers = {'Content-Type': 'text/html'}
     # call the userinfo endpoint
-    url = f"{conf['primary_site_admin_tenant_base_url']}/v3/oauth2/userinfo"
+    url = f"https://{tapis_domain}/v3/oauth2/userinfo"
     headers = {'X-Tapis-Token': token}
     try:
         rsp = requests.get(url, headers=headers)
@@ -477,7 +477,9 @@ def callback(pod_id_net, request: Request):
     except Exception as e:
         raise Exception(f"Error generating Tapis token; debug: {e}")
 
-    username = get_username(token)
+    logger.debug(f"GET /pods/{pod_id_net}/auth/callback - pod_auth_callback, token: {token}")
+
+    username = get_username(tapis_domain=tapis_domain, token=token)
     
     response = make_response(redirect(os.environ['FRONT_URL'], code=302))