Add Elfsight cookie support

Hi, I use Elfsight on my website, They have said 

"only one cookie, and its purpose is to make sure that each person's views of the widget are not counted more often than once in 15 seconds, to prevent our customers from getting too many views."

Can this be added to the services or is there a way for me to add this manually? 

More info here - 

https://help.elfsight.com/article/418-elfsight-and-gdpr 

Thanks