How to remove access for "Complete" action for AR Transactions for few end users Sandbox

 1) Remove "Complete" action button on AR Transactions for few user on the basis of assigned Roles

2) Provide access to few users to "complete" action for  AR Transactions .

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I have used below Edit Page component through Sandbox >>EL but "Complete" Button is getting disabled for all users  

#{securityContext.userInRole['AZM_LOG_COM_ACTION']}

AZM_LOG_COM_ACTION - this is dummy role assigned to 2 users only.