how to return more data from `/get-session`

import type { BetterAuthClientPlugin } from "better-auth/client";
import type { BetterAuthPlugin } from "better-auth/plugins";

export const balancePlugin = () => {
  return {
    id: "balance",
    schema: {
      user: {
        fields: {
          balance: {
            type: "number",
            required: false,
            sortable: false,
            unique: false,
            returned: true,
          },
        },
      },
    },
  } satisfies BetterAuthPlugin;
};

export const balanceClientPlugin = () => {
  return {
    id: "balance",
    $InferServerPlugin: {} as ReturnType<typeof balancePlugin>,
  } satisfies BetterAuthClientPlugin;
};