code: public Member getMember()
      {
          Guild guild = getGuild();
          return guild != null ? guild.getMember(getUser()) : null;
      }
docs: The {@link net.dv8tion.jda.core.entities.Member Member} instance for the reacting user
  or {@code null} if the reaction was not in a guild.
  
  @return Member of the reacting user or null