Hi,
I'm sorry but the login is not related to HikaMarket (or HikaShop) but to Joomla itself.
Otherwise, you can use a subscription component (like Emerald or Akeeba Subscription) in order to have an access which can expire ; but it will be related to the Joomla user groups and not to the "login" or "not login".
You can read more in the part talking about the "vendor paid subscription" in our tutorial documentation.
www.hikashop.com/support/documentation/1...tml#tuto_market_conf
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.