PHP Prepared Statement Issue Object Oriented

Question

Edited: The question that the moderator flagged as 'Already Answered' did NOT answer this question. However, Chris Haas did.

I keep getting the error on line 39 that I do not have a valid username or password, but I am not sure where I am missing the proper logic. Any assistance would be appreciated.

<?php
$configs = include('../hidden/config.php');

echo 'Hello from jslogin.php';

if(isset($_POST)){

    /* Login values from user */
    $username   = $_POST['username'];
    $password   = password_hash($_POST['password'], PASSWORD_DEFAULT);

    /* Define DB variables */
    $db_host        = $configs['db_host'];
    $db_user        = $configs['db_user'];
    $db_password    = $configs['db_password'];
    $db_name        = $configs['db_name'];

    /* Connect to DB */
    $dbc = new mysqli($db_host, $db_user, $db_password, $db_name) 
    or die('Error connecting to Database.');

    /* Prepare and bind the statements */
    $stmt = $dbc->prepare("SELECT first_name FROM user_reg where username=? AND password=?");
    $stmt->bind_param("ss", $username, $password);

    /* Execute prepared statements and interpolate parameterized values*/
    $stmt->execute();

    /* Get result and number of rows returned */
    $result = $stmt->get_result();
    $count = $result->num_rows;

    /* Check to see if statement returned 1 row and pass/fail accordingly and grab firstname*/
    if($count == 1){
        $firstname = $result;
        alert("$firstname Successfully Logged In.");
    }else
    {
        echo 'You need to enter a valid username and/or password!!!';
    }

}