how to show selected user to view mysql data - php

Question

this code showing all MySQL table data to any users but i want only admin and user to show data of mysql query
i have multiple users
1.admin
2.user123
3.xyz
so i want only admin and user to show MySQL table data how can i do this
example
if admin and user123 open the page then mysql data showing correct if xyz user open the page then it will not showing any data
user login name <?php echo $_SESSION['SESS_FIRST_NAME']; ?>
i want to add this one in to mysql query to showing result only admin and user
$query = "SELECT * FROM `follower` WHERE `followername` LIKE '".$letter."%' ORDER BY `followername` ASC LIMIT $from, $max_results";
complete code
<?php
$max_results = 10;
$from = (($page * $max_results) - $max_results);
if(empty($_POST)) {
$query = "SELECT * FROM `follower` WHERE `followername` LIKE '".$letter."%' ORDER BY `followername` ASC LIMIT $from, $max_results";
}
$result = mysql_query("SET NAMES utf8"); //the main trick
$result = mysql_query($query) or die(mysql_error());
$rows = mysql_num_rows($result);
echo "<table class='gridtable' border='1' cellpadding='0' cellspacing='0'>";
echo "<tr><th>Name</th><th>Company Name</th><th>Mobile No</th></tr>";
if ($rows > 0) {
while($row = mysql_fetch_array($result)) {
echo "<tr><td>";
echo $row['followername'];
echo "</td><td>";
echo $row['companyname'];
echo "</td><td>";
echo $row['mobileno'];
echo "</td><td>";
echo $row['contractdatee'];
echo "</td></tr>";
}
} else {
echo "<tr><td align=\"center\" colspan=\"4\">No results found!</td></tr>";
}
echo "</table>";
// Figure out the total number of results in DB:
$total_results = mysql_result(mysql_query("SELECT COUNT(*) as followername FROM follower ORDER BY followername ASC"),0);
// Figure out the total number of pages. Always round up using ceil()
$total_pages = ceil($total_results / $max_results);
// Build Page Number Hyperlinks
echo "<p class=\"style2\">Pages: ";
// Build Previous Link
if($page > 1){
$prev = ($page - 1);
echo "Previous ";
}
for($i = 1; $i <= $total_pages; $i++){
if(($page) == $i){
echo "$i ";
} else {
echo " ";
}
}
// Build Next Link
if($page < $total_pages){
$next = ($page + 1);
echo "Next";
}
echo "</p>";
mysql_close();
?>