Alteração para mostrar 0 quando não há nenhum atendimento em aberto

frontend/src/components/DashboardUser/TableUser.jsx

@@ -137,7 +137,7 @@ const TableUser = ({ classes, usersOnlineInfo, logout }) => {
                         <TableCell>
                           <div style={{ display: "flex", alignItems: "center", gap: "12px" }}>  
                             <Typography className={classes.tableCounterOpen}>
-                              {user.sumOpen === undefined ? 0 : user.sumOpen.count} 
+                              {user.sumOpen === undefined || ('sumOpen' in user && user.sumOpen.count === '') ? 0 : user.sumOpen.count} 
                             </Typography>
                             <Typography className={classes.tableCounterClosed}>
                               {user.sumClosed === undefined ? 0 : user.sumClosed.count}