Cant extract data from firebase webhook

export const extFirestoreRevenueCatPurchasesHandler = onRequest(
    async (request, response) => {
      const {processUserCredits} = require("./functions/userCredits");
      await processUserCredits(request);
      response.status(200).send('Webhook received');
    });

export interface RCEvent {
  api_version: string
  event: {
    aliases: string[]
    app_id: string
    app_user_id: string
    country_code: string
    currency: string
    entitlement_id: string
    entitlement_ids: string[]
    environment: string
    event_timestamp_ms: number
    expiration_at_ms: number
    id: string
    is_family_share: boolean
    offer_code?: string
    original_app_user_id: string
    original_transaction_id: string
    period_type: string
    presented_offering_id: string
    price: number
    price_in_purchased_currency: number
    product_id: string
    purchased_at_ms: number
    store: string
    subscriber_attributes: any
    takehome_percentage: number
    transaction_id: string
    type: string
  }
}

export async function processUserCredits(request: any) {
  const innerBody = request.body as RCEvent;
  const productId = innerBody.event.product_id;

  const userId = innerBody.event.app_user_id;
  //throws event is undefined

innerbody is undefined and I have no idea why. Can someone please help figure this out?

This is a firebase cloud functions.