This connects to SB, authenticates and gets a session token for communicating with SB. If you do not supply a username or password, you will be prompted to enter them.
Arguments
- username
Sciencebase username
- password
Sciencebase password, prompts user if not supplied and no password is returned by `keyring::key_get("sciencebase", username)`. See
keyring-packagedocumentation for more details.