Fix flags check (#1652)

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Fixes OPS-2947

Author: alexandrudanpop

packages/react-ui/src/app/common/auth/lib/utils.ts

@@ -1,6 +1,6 @@
 import { FlagsMap } from '@/app/lib/flags-api';
 
-export const getFederatedUrlBasedOnFlags = (flags: FlagsMap) =>
-  flags.FEDERATED_LOGIN_ENABLED
+export const getFederatedUrlBasedOnFlags = (flags?: FlagsMap) =>
+  flags?.FEDERATED_LOGIN_ENABLED
     ? (flags.FRONTEGG_URL as string | undefined)
     : undefined;