I need to use API to download excel file reports genereted by odoo. BUt csrf token is changing every hour, so I need to use API instead of regular request. 

On documentation, it is given an example on python 
uid = common.authenticate(db, username, password,{})
But I do not know databases names. 

How do I consult databases names? I do know there names because website is in Spanish. There is a way to know those names?