SAML in Appin can be tested with Dummy user

Hello,

We have done setup for the SAML to  get user authorised in GEMI. Now when we are trying to test is with Dummy user and open browser - shift plus right click- run as diffrent user - User is alwasy getting below error

Error 401 - Unauthorized

Sorry, your request could not be processed.

I have checked all settings in Appian also Dev tool is not showing up the Roles whcih are assigned in GEMI.

I am not sure if SAML setup in Appian will work like this by running browser as diffrent user . Any pointer will help.

Thanks in advance .

Pooja