Who was the first person to call marijuana POT? Or a person addicted to marijuan a POTHEAD? Anyone know?

I thought maybe because of growing it in pots ... but nope.  Found this online:

The origin of pot has nothing to do with the culinary tool. The word came into use in America in the late 1930s. It is a shortening of the Spanish potiguaya or potaguaya that came from potación de guaya, a wine or brandy in which marijuana buds have been steeped. It literally means “the drink of grief.”