Add "Wmin" (Watt minutes) to energy unit of measurements

Today for energy only J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, or Gcal may be used.

But for example Shelly 1st gen (Plug S Gen1) the energy is displayed in watt minutes.

The problem is, if I state “Wmin” or “Wm”, this is not a valid unit → I get an error.

If I state nothing, → I get an error (None is not allowed)

Could you please add “Wmin” or “Wm” (however you will call it) as valid unit of measurement for energy.

Thank you.

fwiw what I’ve done so far is just divide it by 60 to get watt-hours.