I do not know how to use the Roblox API For example if I entered MY OWN password in MY OWN game is there a way I can check if it is correct? https://auth.roblox.com/docs
IDK but you but it sounds like its one of those free robux scams wher it asks for login then says wrong password till its correct and it cheks that via the API hmhmmhmhmhmhmmh (vilalger noises)
You can use webhooks like Discord for the text to be sent to. I know Discord blocked ROBLOX from being used as a webhook, but there has been a loophole found you can use. Just search it up and you'll most likely find it. If not, ask me.