People need to log in to start using my app. They can register themselves on my website and their passwords are stored using Bcrypt. When they login in the app I transfer the password as plain text in a GET request (https://website.com/file.php?pass=password) to a php file which is using Bcrypt again to compare the password to the one stored in my database. My website uses a SSL certificate and with that a HTTPS connection at all times. So my NSURL starts with a HTTPS request. My question is, is it safe enough this way or is it completely unsafe? If so what would you suggest to validate the login of the user?