Trying to Scale Root motion in blueprint

Anyone able to help me with this one? I have a nice root motion attack moving forward x units. i’d like to be able to dynamically adjust this for gameplay. I found a function in the engine called
“set anim root motion translation scale” but its not usable in bp and i don’t know enough about visual studio or c++ to know what i’m supposed to do to get access to it. Anyone kind enough to walk me through that process?