pass ldap environment variables

ki/auth.py

@@ -60,7 +60,11 @@ def ldap_auth(username, password):
         return None
 
     if not connection.search(app.config['KI_LDAP_BASE_DN'], f"(&(objectClass=inetOrgPerson)(uid={escaped_username}))"):
-        app.logger.info(f"ldap search of {username} failed")
+        app.logger.info("ldap search failed")
+        return None
+
+    if not connection.entries:
+        app.logger.info(f"no ldap search result for {username}")
         return None
 
     user_dn = connection.entries[0].entry_dn