fix: add assertion around sessiontokenpollmode deprecation [#263]

Author: shinyford

packages/clerk_auth/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.0.13-beta
+
+* change: session token polling now defaults to ON (previous versions had it defaulting to OFF)
+
 ## 0.0.12-beta
 
 * fix: ensure decoding of UserPublic.identifier is optional [#256]

packages/clerk_auth/lib/src/clerk_auth/auth_config.dart

@@ -29,7 +29,11 @@ class AuthConfig {
     Duration? clientRefreshPeriod,
     Duration? httpConnectionTimeout,
     HttpService? httpService,
-  })  : localesLookup = localesLookup ?? Auth.defaultLocalesLookup,
+  })  : assert(
+          sessionTokenPollMode == null,
+          'sessionTokenPollMode has been deprecated: please use sessionTokenPolling',
+        ),
+        localesLookup = localesLookup ?? Auth.defaultLocalesLookup,
         isTestMode = isTestMode ?? false,
         telemetryEndpoint =
             telemetryEndpoint ?? 'https://clerk-telemetry.com/v1/event',