Hello @marchino 

Based on the document https://docs.databricks.com/dev-tools/authentication-oauth.htmlThe access token will expire in one hour. You must request a new OAuth access token after the expiration. Personal Access Token is good until it expires but the service principal has to request a session token once an hour. Personal Access Tokens for users can be generated with any expiration date, including an indefinite lifetime, but Personal Access Tokens for service principals typically expire within one hour. This is because service principals are recommended for use with automated tools, systems, scripts, and apps, and it is considered a security best practice to have tokens that expire frequently to reduce the risk of unauthorized access.