unauthorized error on next js api routes

[Error [APIError]: ] {
  status: 'UNAUTHORIZED',
  body: undefined,
  headers: {},
  statusCode: 401
}

[Error [APIError]: ] {
  status: 'UNAUTHORIZED',
  body: undefined,
  headers: {},
  statusCode: 401
}

import { auth } from '@/lib/auth';
import { z } from 'zod';
import { headers } from 'next/headers';

export async function POST(req: Request) {
    try {
        const body = await req.json();

        const createOrgSchema = z.object({
            name: z.string().min(1),
            slug: z.string().min(1),
            logo: z.string().optional(),
        });

        const result = createOrgSchema.safeParse(body);

        if (!result.success) {
            return Response.json(
                { error: 'invalid data', details: result.error.issues },
                { status: 400 }
            );
        }
        const { name, slug, logo } = result.data;

        const organizationSlug = slug
            .toLowerCase()
            .trim()
            .normalize('NFD')
            .replace(/[\u0300-\u036f]/g, '')
            .replace(/[^a-z0-9]+/g, '-')
            .replace(/^-+|-+$/g, '');

        const isSlugAvaliable = await auth.api.checkOrganizationSlug({
            body: {
                slug: organizationSlug,
            },
        });

        if (!isSlugAvaliable) {
            return Response.json({ error: 'Slug is taken.' }, { status: 400 });
        }

        await auth.api.createOrganization({
            headers: await headers(),
            body: {
                name: name,
                slug: organizationSlug,
            },
        });

        return new Response(null, { status: 201 });
    } catch (error: any) {
        console.log(error);
        if (error.statusCode) {
            return Response.json(error, { status: error.statusCode });
        }
        return Response.json(error, { status: 400 });
    }
}

import { auth } from '@/lib/auth';
import { z } from 'zod';
import { headers } from 'next/headers';

export async function POST(req: Request) {
    try {
        const body = await req.json();

        const createOrgSchema = z.object({
            name: z.string().min(1),
            slug: z.string().min(1),
            logo: z.string().optional(),
        });

        const result = createOrgSchema.safeParse(body);

        if (!result.success) {
            return Response.json(
                { error: 'invalid data', details: result.error.issues },
                { status: 400 }
            );
        }
        const { name, slug, logo } = result.data;

        const organizationSlug = slug
            .toLowerCase()
            .trim()
            .normalize('NFD')
            .replace(/[\u0300-\u036f]/g, '')
            .replace(/[^a-z0-9]+/g, '-')
            .replace(/^-+|-+$/g, '');

        const isSlugAvaliable = await auth.api.checkOrganizationSlug({
            body: {
                slug: organizationSlug,
            },
        });

        if (!isSlugAvaliable) {
            return Response.json({ error: 'Slug is taken.' }, { status: 400 });
        }

        await auth.api.createOrganization({
            headers: await headers(),
            body: {
                name: name,
                slug: organizationSlug,
            },
        });

        return new Response(null, { status: 201 });
    } catch (error: any) {
        console.log(error);
        if (error.statusCode) {
            return Response.json(error, { status: error.statusCode });
        }
        return Response.json(error, { status: 400 });
    }
}