Calls the Django /oauth2/test/ endpoint to report the current authentication
method and user profile. Requires a valid OAuth2 access token acquired via
login_db().
Usage
whoami(refresh = TRUE, vb = options::opt("vb"))Value
A list containing auth_method and user fields (both lists) or
NULL if the request fails due to lack of authentication.
Examples
if (FALSE) { # \dontrun{
login_db()
whoami()
} # }
