I'm new in Carto. I have been trying to figure out how Maps are used, I tried this code that is in the web; however the map is never displayed.
from cartoframes.auth import set_default_credentials, Credentials, get_default_credentials
from cartoframes.viz import Map, Layer
set_default_credentials('cartoframes')
current_creds = get_default_credentials()
Map([Layer('countries')])