Hi, How could i make a Login and Registering System with an Excel file which would be hosted at Dropbox. So i have a GUI There you could choose if u want to Login or Create an account. If u choosen Register new account you would have to make a Email a Username a Password and Password check. Before Registering it has to check if the Username and Email already exists if not you would be able to create and after this Login~ My main Problem would be getting acces to the file at Dropbox and writing to Excel. Thank you very much who tried to help me.