Update welcome message command

commands/welcome_message.go

 package commands
 
 import (
+	"fmt"
 	"strings"
 
 	multiplexer "git.randomchars.net/Reviath/RemiliaScarlet/Multiplexer"
@@ -33,13 +34,13 @@ func WelcomeMessageCommand(ctx CommandHandler.Context, _ []string) error {
 			return nil
 		}
 
-		err := db.QueryRow("SELECT message FROM welcomemessage WHERE guildid ='" + ctx.Guild.ID + "'").Scan(&tag.message)
+		err := db.QueryRow(fmt.Sprintf("SELECT message FROM welcomemessage WHERE guildid ='%s'", ctx.Guild.ID)).Scan(&tag.message)
 		if err == nil {
 			ctx.Reply("Hoş geldin mesajı zaten ayarlanmış, sıfırlamak için reset_welcome_message komutunu kullan.")
 
 			return nil
 		} else {
-			insert, err := db.Query("INSERT INTO welcomemessage (message, guildid) VALUES ('" + strings.Join(multiplexer.GetArgs(ctx.Message.Content, multiplexer.GetPrefix()), " ") + "', '" + ctx.Guild.ID + "')")
+			insert, err := db.Query(fmt.Sprintf("INSERT INTO welcomemessage (message, guildid) VALUES ('%s', '%s')", strings.Join(multiplexer.GetArgs(ctx.Message.Content, multiplexer.GetPrefix()), " "), ctx.Guild.ID))
 			if err != nil {
 				ctx.Reply("Bir hata oluştu.")
 
@@ -64,13 +65,13 @@ func WelcomeMessageCommand(ctx CommandHandler.Context, _ []string) error {
 		return nil
 	}
 
-	err := db.QueryRow("SELECT message FROM welcomemessage WHERE guildid ='" + ctx.Guild.ID + "'").Scan(&tag.message)
+	err := db.QueryRow(fmt.Sprintf("SELECT message FROM welcomemessage WHERE guildid ='%s'", ctx.Guild.ID)).Scan(&tag.message)
 	if err == nil {
 		ctx.Reply("Welcome message is already existing (to reset, use reset_welcome_message command).")
 
 		return nil
 	} else {
-		insert, err := db.Query("INSERT INTO welcomemessage (message, guildid) VALUES ('" + strings.Join(multiplexer.GetArgs(ctx.Message.Content, multiplexer.GetPrefix()), " ") + "', '" + ctx.Guild.ID + "')")
+		insert, err := db.Query(fmt.Sprintf("INSERT INTO welcomemessage (message, guildid) VALUES ('%s', '%s')", strings.Join(multiplexer.GetArgs(ctx.Message.Content, multiplexer.GetPrefix()), " "), ctx.Guild.ID))
 		if err != nil {
 			ctx.Reply("An error occurred, please try again.")