small fixes and refactoring

Backend/endpoints/auto_logout.go

@@ -29,8 +29,9 @@ func autoLogout(w http.ResponseWriter) {
 			err = user.Logout()
 			if err != nil {
 				fmt.Printf("Error logging out user %v\n", err)
-			}
+			}else {
 			logged_out_users = append(logged_out_users, user)
+			}
 		}
 
 	}