Не добавляются данные в таблицу Mysql

вопрос решился вот таким образом

if (isset($_POST['register'])) {
    include 'database.php';

    function  CheckElement($data)
    {
        $data = trim($data);
        $data = htmlspecialchars($data);
        $data = stripcslashes($data);
        return $data;
    }   

    $name = mysqli_real_escape_string($conn ,CheckElement($_POST['authname']));
    $pass = mysqli_real_escape_string($conn ,CheckElement($_POST['authpassword']));
    $passagain = mysqli_real_escape_string($conn ,  CheckElement($_POST['authpasswordagain']));
    $email = mysqli_real_escape_string($conn , CheckElement($_POST['authemail']));

    $sql = "INSERT INTO users (user_name , user_password , user_password2 , user_email) VALUES 
    ('".$name."' , '".$pass."' , '".$passagain."' , '".$email."' )";
    $query = mysqli_query($conn , $sql);
   if ($query) {
    echo "New record created successfully";
   } else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
   }

  }


 ?>
<form action="<?php print htmlspecialchars($_SERVER['PHP_SELF']);?>" class="form" method="POST"   onsubmit="return CheckFunction()">
            <label for="auth">Name</label>
            <input type="text" name="authname" placeholder="Enter Name" id="auth"><span id="errorname"></span>
            <label for="auth">Password</label>
            <input type="password" name="authpassword" placeholder="Enter Password" id="auth"><span id="errorpass"></span>
            <label for="auth">Password</label>
            <input type="password" name="authpasswordagain" placeholder="Enter Password Again" id="auth"><span id="errorpass2"></span>
            <label for="auth">Email</label>
            <input type="email" name="authemail" placeholder="Enter Email" id="auth"><span id="erroremail"></span>
            <button type="submit"  name="register">Button</button>
        </form>

Спасибо всем за совет