fix[__init__.py]: correct check if accessGroupFilter and accessGroupAttribute is not set

radicale-auth-ldap/__init__.py

@@ -103,7 +103,7 @@ class Auth(BaseAuth):
                 userAttributeValue = conn.response[0]['attributes'][userAttribute]
                 logger.debug("LDAP user DN: %s" % userDn)
 
-                if (not accessGroupFilter == None) and (not accessGroupAttribute == None):
+                if (not accessGroupFilter == "None") and (not accessGroupAttribute == "None"):
                     userMemberOf = conn.response[0]['attributes'][accessGroupAttribute]
 
                     userIsInAccessGroup = False