Connection failed: Host 'xx.xx.xx.xx' is not allowed to connect to this MySQL server - AJAX ans AWS

I am trying to insert some data from the client browser to a MySQL database on AWS server.

The code worked on godaddy so it looks like a permissions/security issue.

$servername = "xx.xx.xx.xx";
$username = "user";
$password = "mypass";
$dbname = "dbName";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "INSERT INTO mytable ('email')
VALUES ('" . $email . "')";

echo $sql;

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();

I am getting the error saying "Connection failed: Host x.x.x.x is not allowed to connect to this MySQL server "

How do I allow connections to this from a client browser?

I have already commented out the line bind-address = 127.0.0.1