We should be able to set credit limits for generated cards to protect checking account overdrafts

Can you unlink the "temporary card" from my checking account so it doesn't get overdrafted??? It might be easier to allow me to set a credit limit for this "temporary card" to protect myself. This has been going on since the plugin was created. How could anyone miss this function??? I am sure EVERYONE who uses the plugin thinks what if I overdraw my bank account from unforseen charges !!!!!!