fix: use errorHandler

Author: dtmeadows

finch-java-core/src/main/kotlin/com/tryfinch/api/client/FinchClientAsyncImpl.kt

@@ -151,7 +151,7 @@ class FinchClientAsyncImpl(private val clientOptions: ClientOptions) : FinchClie
                 )
                 .build()
         return clientOptions.httpClient.executeAsync(request).thenApply {
-            getAccessTokenHandler.handle(it).accessToken
+            getAccessTokenHandler.handle(errorHandler.handle(it)).accessToken
         }
     }
 

finch-java-core/src/main/kotlin/com/tryfinch/api/client/FinchClientImpl.kt

@@ -140,7 +140,7 @@ class FinchClientImpl(private val clientOptions: ClientOptions) : FinchClient {
                 )
                 .build()
         return clientOptions.httpClient.execute(request).let {
-            getAccessTokenHandler.handle(it).accessToken
+            getAccessTokenHandler.handle(errorHandler.handle(it)).accessToken
         }
     }