Cant manually set cookie using authClient on the server

{
   "cookieName":"name.session_token",
   "cookieValue":"jItmNnCgdeLOpqJ6NHv6DzKG5rit62hp.Fz%2FVmX2%2BgqRgYSYz4NfO%2FiVoZC9c32OEjC2fxbRv3gY%3D",
   "options":{
      "path":"/",
      "maxAge":604800,
      "domain":".localhost",
      "httpOnly":true,
      "sameSite":"lax"
   }
}

        let cookie: string | null = null;
        await authClient.signIn.email(
            {
                email: dummyMail,
                password: form.data.pin,
                callbackURL: '/auth/callback'
            },
            {
                onSuccess(context) {
                    cookie = context.response.headers.get('set-cookie');
                }
            }
        );
        if (!cookie) return message(form, 'Login failed', { status: 400 });
        const { cookieName, cookieValue, options } = parseCookie(cookie);
        cookies.set(cookieName, cookieValue, options);

import type { CookieSerializeOptions } from 'cookie';
interface ParsedCookie {
    cookieName: string;
    cookieValue: string;
    options: CookieSerializeOptions & { path: string };
}

export const parseCookie = (cookieStr: string): ParsedCookie => {
     const mainParts = cookieStr.split(';')[0].split('=');
    const cookieName = mainParts[0].trim();
    const cookieValue = mainParts.slice(1).join('=').trim(); // Handle values that might contain '='
    const options: CookieSerializeOptions & { path: string } = {
        path: '/' // Default path to ensure it's always present
    };

    const parts = cookieStr.split(';').slice(1);

    parts.forEach((part) => {
        const option = part.trim();
        const equalIndex = option.indexOf('=');

        if (equalIndex === -1) {
            const key = option.trim();
            if (key === 'HttpOnly') {
                options.httpOnly = true;
            } else if (key === 'Secure') {
                options.secure = true;
            }
        } else {
            const key = option.substring(0, equalIndex).trim();
            const value = option.substring(equalIndex + 1).trim();

            if (key === 'Max-Age') {
                options.maxAge = parseInt(value, 10);
            } else if (key === 'Domain') {
                options.domain = value;
            } else if (key === 'Path') {
                options.path = value;
            } else if (key === 'SameSite') {
                if (value === 'Lax' || value === 'Strict' || value === 'None') {
                    options.sameSite = value.toLowerCase() as 'lax' | 'strict' | 'none';
                }
            }
        }
    });
    return { cookieName, cookieValue, options };
};