discord: send in-channel reply to !start

discord.go

@@ -302,6 +302,13 @@ func (d *DiscordDaemon) commandStart(s *dg.Session, m *dg.MessageCreate, lang st
 	}
 	user := d.MustGetUser(channel.ID, m.Author.ID, m.Author.Discriminator, m.Author.Username)
 	d.users[m.Author.ID] = user
+
+	_, err = d.bot.ChannelMessageSendReply(m.ChannelID, d.app.storage.lang.Telegram[lang].Strings.get("discordDMs"), m.MessageReference)
+	if err != nil {
+		d.app.err.Printf("Discord: Failed to send reply to \"%s\": %v", m.Author.Username, err)
+		return
+	}
+
 	content := d.app.storage.lang.Telegram[lang].Strings.get("startMessage") + "\n"
 	content += d.app.storage.lang.Telegram[lang].Strings.template("languageMessage", tmpl{"command": "!lang"})
 	_, err = s.ChannelMessageSend(channel.ID, content)

lang/telegram/en-us.json

@@ -7,6 +7,7 @@
         "matrixStartMessage": "Hi\nEnter the below PIN in the Jellyfin sign-up page to verify your account.",
         "invalidPIN": "That PIN was invalid, try again.",
         "pinSuccess": "Success! You can now return to the sign-up page.",
-        "languageMessage": "Note: See available languages with {command}, and set language with {command} <language code>."
+        "languageMessage": "Note: See available languages with {command}, and set language with {command} <language code>.",
+        "discordDMs": "Please check your DMs for a response."
     }
 }