Refactor SAML Auth in Excel

When configuring a SAML single-sign-on connection in Excel, the login information is cached. In order to logout of the SAML connection there is no other possibility than check the option "Delete cache when closing Excel" in "Options>Modeler options" (see screenshot attached)

The main drawback is pretty obvious: this deletes ALL the cached information about the connections. If you have 20 connections using SAML and you want to log out of 1, then you will have to re-log in the 19 others

It is also not a one-time action but everytime Excel is closed

That is why we think that this should be refactored to take these use-cases into account (not only speaking of security)