This uses the keyring package to store and load credentials.
If the keyring package does not exists, it will default to look for
a config-file in the 'repository'-folder, under your home directory.
This can be changed by setting the option IOHprofiler.config_dir
If you already have an account, please call `set_DSC_credentials`
with the corresponding username and password.
If you don't have an account, you can register for one using `register_DSC`