diff --git a/ecoinvent_interface/core.py b/ecoinvent_interface/core.py
index 3e31e9e..3b480d5 100644
--- a/ecoinvent_interface/core.py
+++ b/ecoinvent_interface/core.py
@@ -74,6 +74,9 @@ def __init__(
         self.password = settings.password
         if not self.password:
             raise ValueError("Missing password; see configurations docs")
+        self.client_id = settings.client_id
+        if not self.client_id:
+            raise ValueError("Missing client_id; see configurations docs")
 
         self.urls = URLS if urls is None else urls
         self.custom_headers = custom_headers or {}