Type Inference from `createServerFn`

const fetchCustomer = createServerFn()
  .middleware([authMiddleware])
  .handler(async ({ context }) => {
    const customers = await stripe.customers.search({
      query: `metadata['externalId']:'${context.idToken.sub}'`,
      expand: ["data.subscriptions"],
    });

    if (!customers.data.length) return null;

    return customers.data[0];
  });

                               Type 'BankAccount' is not assignable to type '{ id: string; object: "bank_account"; account?: string | { id: string; object: "account"; business_profile?: { annual_revenue?: { amount: number | null; currency: string | null; fiscal_year_end: string | null; } | null | undefined; ... 10 more ...; url: string | null; } | null | undefined; ... 20 more ...; type: Typ...'.
                                 Type 'BankAccount' is not assignable to type '{ id: string; object: "bank_account"; account?: string | { id: string; object: "account"; business_profile?: { annual_revenue?: { amount: number | null; currency: string | null; fiscal_year_end: string | null; } | null | undefined; ... 10 more ...; url: string | null; } | null | undefined; ... 20 more ...; type: Typ...'.
                                   Types of property 'account' are incompatible.
                                     Type 'string | Account | null | undefined' is not assignable to type 'string | { id: string; object: "account"; business_profile?: { annual_revenue?: { amount: number | null; currency: string | null; fiscal_year_end: string | null; } | null | undefined; ... 10 more ...; url: string | null; } | null | undefined; ... 20 more ...; type: Type; } | null | undefined'.
                                       Type 'Account' is not assignable to type 'string | { id: string; object: "account"; business_profile?: { annual_revenue?: { amount: number | null; currency: string | null; fiscal_year_end: string | null; } | null | undefined; ... 10 more ...; url: string | null; } | null | undefined; ... 20 more ...; type: Type; } | null | undefined'. [2345]