Handle exception of nonexistent nickname in loawa.js

@@ -23,6 +23,10 @@ module.exports = {
 		};
         await getHTML().then(html=>{
             const $ = cheerio.load(html.data);
+            if($("div.profile-attention span:nth-child(2)").text() === "캐릭터명을 확인해주세요." || $("div.level-info2__expedition").text().split("Lv.")[1] === "0.00"){
+                interaction.reply({content: "`"+interaction.options.getString("닉네임")+"`"+"이라는 캐릭터는 없습니다", allowedMentions: {repliedUser: false}});
+                return;
+            }
             open(`https://loawa.com/char/${interaction.options.getString("닉네임")}`);
             interaction.reply({content: `${interaction.options.getString("닉네임")}의 로아와 정보로 이동합니다.`, allowedMentions: {repliedUser: false}});
         });