How do I make a chatted event give points on a data storage?

So, I am working on making a database for a group to keep track of points that each member earns in events. I was hoping to have a place where the High Rank goes and says a command such as ":Point 12345", 12345 being the UserId of the person being rewarded the points. I know that data stores work with the UserId as the key. The way I make it is to where the chatted event awards the point to the person saying the command rather than another person. Is there a way to make it to where the spoken UserId is awarded the point?