BackendlessUser user = new BackendlessUser();
user.setProperty("email", "james.bond@mi6.co.uk");
user.setPassword("my_super_password");
Backendless.UserService.register(user, new BackendlessCallback<BackendlessUser>() {
public void handleResponse(BackendlessUser backendlessUser) {
Log.i("Registration", backendlessUser.getEmail() + " successfully registered");
}
}); // Attached scrrenshot of the log
Are you sure you set proper credentials in initApp call?