type checking error??

import { GetServerSidePropsContext } from "next";
import { getServerAuthSession } from "../server/auth";
import { Session } from "next-auth";

type Callback = (data: { session: Session }) => void;

type RoleRedirects = {
  [key: string]: {
    [key: string]: string;
  };
};

const roleRedirects: RoleRedirects = {
  cashier: {
    ADMIN: "/admin",
    MANAGER: "/manager",
  },
  manager: {
    ADMIN: "/admin",
    CASHIER: "/cashier",
  },
  admin: {
    MANAGER: "/manager",
    CASHIER: "/cashier",
  },
};

export async function roleGuard(
  ctx: GetServerSidePropsContext,
  cb: Callback,
  role: string
) {
  try {
    const session = await getServerAuthSession(ctx);
    if (!session) {
      return {
        redirect: {
          destination: "/",
          permanent: false,
        },
      };
    }
    const redirectDestination = roleRedirects[role][session.user?.role as string];
    if (redirectDestination) {
      return {
        redirect: {
          destination: redirectDestination,
          permanent: false,
        },
      };
    }

    return cb({ session });
  } catch (error) {
    return {
      redirect: {
        destination: "/",
        permanent: false,
      },
    };
  }
}

const redirectDestination = roleRedirects[role][session.user?.role as string];