∀ {G : Type u_1} {M : Type u_3} {α : Type u_5} [inst : AddGroup G] [inst_1 : AddMonoid M] [inst_2 : AddAction G M]
  [inst_3 : VAdd M α] [inst_4 : VAdd G α] [inst_5 : VAddCommClass G M M] [inst_6 : VAddAssocClass G M M]
  [VAddAssocClass G M α], VAddAssocClass G (AddUnits M) α