password_verify($_POST['password'], $hash) always return false password

My question is, when I try to log in with correct password, it still display the error message "You have entered wrong password, try again!".(Register works fine, the part checking if user already exist works fine) Here is the code:

register.php (works):
<?php 
include('db_conn.php'); //db connection
session_start();

/* Registration process, inserts user info into the database 
   and sends account confirmation email message
 */

$_SESSION['email'] = $_POST['email'];
$_SESSION['full_name'] = $_POST['name'];

// Escape all $_POST variables to protect against SQL injections
$full_name = $mysqli->escape_string($_POST['name']);
$email = $mysqli->escape_string($_POST['email']);
$password = $mysqli->escape_string(password_hash($_POST['password'], PASSWORD_BCRYPT));
$usertype = $mysqli->escape_string("A");
$hash = $mysqli->escape_string( md5( rand(0,1000) ) );

// Check if user with that email already exists
$result = $mysqli->query("SELECT * FROM user WHERE Email='$email'") or die($mysqli->error());

if (isset($_POST["submit"])){
// We know user email exists if the rows returned are more than 0
    if ( $result->num_rows > 0 ) {

        $_SESSION['message'] = 'User with this email already exists!';
        // header("location: error.php");

    }
    else { // Email doesn't already exist in a database, proceed...

        $sql = "INSERT INTO user (Email, Password, UserType, FullName, Hash) " 
            . "VALUES ('$email','$password', '$usertype','$full_name', '$hash')";

        // Add user to the database
        if ( $mysqli->query($sql) ){


            $_SESSION['logged_in'] = true; // So we know the user has logged in
            $_SESSION['message'] =

                    "You are registered";

            header("location: home.php"); 
        }

        else {
            $_SESSION['message'] = 'Registration failed!';
            // header("location: error.php");
        }

    }
}

?>




sign_in.php (not working properly):
<?php 
include('db_conn.php'); //db connection
session_start();

$email = $mysqli->escape_string($_POST['email']);
$result = $mysqli->query("SELECT * FROM user WHERE Email='$email'");


if (isset($_POST["submit"])){
    if ( $result->num_rows == 0 ){ // User doesn't exist
        $_SESSION['message'] = "User with that email doesn't exist!";
        // header("location: error.php");
    }
    else { // User exists
        $user = $result->fetch_assoc();
        echo $_POST['password'].$user['Password'];
        if ( password_verify($_POST['password'], $user['Password']) ) {

            $_SESSION['email'] = $user['Email'];
            $_SESSION['full_name'] = $user['Name'];
            $_SESSION['user_type'] = $user['UserType'];


            // This is how we'll know the user is logged in
            $_SESSION['logged_in'] = true;

            header("location: home.php");
        }
        else {
            $_SESSION['message'] = "You have entered wrong password, try again!";
            // header("location: error.php");
        }
    }
}

?>