fix(GuildEmojiManager): check for guild in methods that use it (#4886)

src/errors/Messages.js

@@ -103,6 +103,8 @@ const Messages = {
   FETCH_GROUP_DM_CHANNEL: "Bots don't have access to Group DM Channels and cannot fetch them",
 
   MEMBER_FETCH_NONCE_LENGTH: 'Nonce length must not exceed 32 characters.',
+
+  GUILDEMOJIMANAGER_NO_GUILD: 'Method cannot be called from a Client instance.',
 };
 
 for (const [name, message] of Object.entries(Messages)) register(name, message);