src/routes/api/@me/+server.ts

import { json, type RequestEvent } from '@sveltejs/kit';

/** @type {import('./$types').RequestHandler} */

export async function GET(request : RequestEvent) {
  if (!request.cookies.get('hf_access_token')) {
    return json({
      error: {
        token: "You must be logged"
      }
    }, { status: 401 })
  }

  const response = await fetch("https://huggingface.co/oauth/userinfo", {
    method: "GET",
    headers: {
      Authorization: `Bearer ${request.cookies.get('hf_access_token')}`,
    },
  })

  const user = await response.clone().json().catch(() => ({}));

  if (!user?.sub) {
    return json({
      error: {
        token: "Token is invalid"
      }
    }, { status: 401 })
  }

  return json({
    user
  })
}