Each type of Teradata QueryGrid connector uses different mechanisms for authenticating the local user on the remote system.
Presto supports Kerberos authentication and LDAP. Presto user credentials are stored in the Username and Password properties in the connector or link settings in Teradata QueryGrid. For information about setting Username and Password in the QueryGrid portlet, see Presto Connector and Link Properties and Adding a Connector.
Apache Sentry support has been added starting with Presto 208t. For information on setting up Presto with Sentry, see https://docs.starburstdata.com/latest/security/sentry.html.
Apache Ranger support has been added starting with Presto 208t. For information on setting up Presto with Apache Ranger, see https://docs.starburstdata.com/latest/security/ranger.html.