`Argument of type 'SQL<unknown>' is not assignable to parameter of type 'IndexColumn'.`

import { SQL, sql } from "drizzle-orm";
import {
  AnyPgColumn,
  pgTable,
  timestamp,
  uniqueIndex,
  uuid,
  varchar,
} from "drizzle-orm/pg-core";

export const users = pgTable(
  "users",
  {
    id: uuid("id").defaultRandom().notNull().primaryKey(),
    email: varchar("email", { length: 256 }).notNull(),
    username: varchar("username", { length: 16 }).notNull(),
    displayname: varchar("displayname", { length: 32 }).notNull(),
    created_at: timestamp("created_at", { mode: "date" }).notNull(),
  },
  (table) => ({
    emailUniqueIndex: uniqueIndex("emailUniqueIndex").on(lower(table.email)),
    usernameUniqueIndex: uniqueIndex("usernameUniqueIndex").on(lower(table.username))
  }),
);

export function lower(email: AnyPgColumn): SQL {
  return sql`lower(${email})`;
}