exclude admin from first solver
exclude admin from first solver

--HG--
branch : algo

jittat/cafe-grader-web,cafe-grader-team/cafe-grader-web,nattee/cafe-grader-web,nattee/cafe-grader-web,cafe-grader-team/cafe-grader-web,cafe-grader-team/cafe-grader-web,nattee/cafe-grader-web,jittat/cafe-grader-web,nattee/cafe-grader-web,cafe-grader-team/cafe-grader-web