Just how much sugar is in a shot of 99 shot?

I daily drinker 99 shots. People that know this keep telling me that it is an insane amount of sugar. Now I know it is an insane amount of calories, but sugar? I look it up and it says they have no sugar. I’ve looked it up hundreds of times and it always says no sugar. Even when I just bought one slme guy behind me in line said he daily drank them everyday until he found out how much sugar is in them. How much sugar is in them? Every time I look it up it says it has 0 sugar.