Amplify Gen 2 Predictions transcribe set up

Hi everyone,

I am trying to set up amplify Predictions transcribe in my react native app and I keep getting a Transcription error: [NoRegion: Missing region.] but i can't seem to find where to add that info. I looked a lot in the documentation for gen 2 and no luck

This is my set up so far:

backend.ts

import { defineBackend } from "@aws-amplify/backend";
import { auth } from "./auth/resource";
import { data } from "./data/resource";
import { Stack } from "aws-cdk-lib";
import { PolicyStatement } from "aws-cdk-lib/aws-iam";

const backend = defineBackend({
  auth,
  data,
});

// Configure a policy for the required use case.
// The actions included below cover all supported ML capabilities
backend.auth.resources.unauthenticatedUserIamRole.addToPrincipalPolicy(
  new PolicyStatement({
    actions: [
      "translate:TranslateText",
      "polly:SynthesizeSpeech",
      "transcribe:StartStreamTranscriptionWebSocket",
    ],
    resources: ["*"],
  })
);

backend.addOutput({
  custom: {
    Predictions: {
      convert: {
        translateText: {
          defaults: {
            sourceLanguage: "en",
            targetLanguage: "es",
          },
          proxy: false,
          region: Stack.of(backend.auth.resources.unauthenticatedUserIamRole)
            .region,
        },
        transcription: {
          defaults: {
            language: "en-US",
          },
          proxy: false,
          region: Stack.of(backend.auth.resources.unauthenticatedUserIamRole)
            .region,
        },
      },
    },
  },
});

How I am using it:

  const transcribeAudio = async (audioBytes) => {
    try {
      const { transcription } = await Predictions.convert({
        region: "us-east-1",
        transcription: {
          source: {
            bytes: audioBytes,
          },
        },
      });
      console.log("Transcription:", transcription);
      // Handle the transcription result (e.g., set it to state, display it, etc.)
    } catch (error) {
      console.error("Transcription error:", error);
    }
  };

Any help would be very much appreciated thank you so much