There are few cookies gmid, Login_Token, LoginTokenExp, glt_<apikey> which are responsible for user session getting deleted in chrome incognito mode, or if browser does not accept the third party cookies, therefore user session gets over and there is no possibility to keep session continue and
accounts.getAccountInfo returning "403005 Unauthorised User" error from screen-sets with in the account.
Is there any way to fix it, or will it be like sso where additional cname domain has to configured.
In order to support browsers where 3rd party cookies are blocked you need to define a custom API domain prefix.
You can read more about it here: