i have added my Non-Admin user to the "Domo Workbench Users"

 

hi,

i have added my Non-Admin user to the "Domo Workbench Users" Local group that is created while installing workbench its working fine for sometime when i shutdown and restart my system its again asking me admin username and password to get access to workbench and also my username is deleted from the admin group. 
why is this happening and is there a solution please tell me

thank you