PHP password_verify always returning false even when hardcoded

Here's my code:

function login() {
    //Declare variables
    $username = $_POST["login"]; 
    $password = $_POST["password"];
    $client = $_POST["clients"];

    //QueryDB
    $servername = "localhost";
    $SQLUsername = "XXXX";
    $SQLPassword = "XXXX";
    $dbname = "XXXX";

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

    //Set query then run it
    $sql = "SELECT * FROM Users WHERE Username ='$username'";
    $result = $conn->query($sql);
    $row = $result->fetch_array(MYSQLI_ASSOC);

    //Verify Password
     if ($result->num_rows === 1) {
        if (password_verify($password, $row['Password'])) {
            //Build XML request
            $XMLRequest = "<?xml version='1.0'?><Login><Client>".$client."</Client><LoginDetails><Username>".$username."</Username><Password>".$newhash."</Password></LoginDetails></Login>";

            //Build URL
            $ReplacedValues = array("NewType" => "login", "NewHash" => $XMLRequest);
            $NewString = strtr($GLOBALS["params"], $ReplacedValues);

            $NewUrl = $GLOBALS["link"].$NewString;

            //Post to Server
            header('Location: '.$NewUrl);
        }
        else {
            echo "Password is wrong"."<br>";
            echo $password."<br>";
            echo $row['Password'];
        }
    } else {
        echo "more then 1 row";
    }

    mysqli_close($conn);
}

My issue is that even if I hard code my password variable and Hash variable to their respective values the if condition returns false. Any idea why? The page does when it loads, loads the else condition to show me the user input password and the correct hash value from the DB. My DB is set to CHAR(255) for the password.

UPDATE** Here is my C# discussed in the comments. This is not the complete code just up to the part of the insert statement for the DB. I am able to insert into the SQL server DB just fine.

public static string WebsiteRegister(XmlDocument XMLBody)
        {
            //Get SQL connection string
            XmlNodeList XMLNodes = SQLConnectionMethods.EstablishSQLServerConnection("SQL");
            string ConnectionString = XMLNodes.Item(0).ChildNodes[0].InnerText;
            string UserName = XMLNodes.Item(0).ChildNodes[1].InnerText;
            string Password = XMLNodes.Item(0).ChildNodes[2].InnerText;

            //Open connnection
            SqlConnection cnn = new SqlConnection(ConnectionString);
            SQLConnectionMethods.OpenSQLServerConnection(cnn);

            try
            {
                string username = XMLBody.SelectSingleNode("register/registerdetails/username").InnerText;
                string pass = XMLBody.SelectSingleNode("register/registerdetails/password").InnerText;
                string fname = XMLBody.SelectSingleNode("register/registerdetails/firstname").InnerText;
                string lname = XMLBody.SelectSingleNode("register/registerdetails/lastname").InnerText;
                string email = XMLBody.SelectSingleNode("register/registerdetails/email").InnerText;
                string accountRef = XMLBody.SelectSingleNode("register/registerdetails/accountreference").InnerText;
                string client = XMLBody.SelectSingleNode("register/client").InnerText;

                //Build Query string
                string queryString = $"Insert into [dbo].[UserAccounts] (AccountReference, FirstName, LastName, Email, Username, Pass, Client) values ('{accountRef}', '{fname}', '{lname}', '{email}', '{username}', '{pass}', '{client}')";

                //Process request
                using (SqlCommand myCommand = new SqlCommand(queryString, cnn))
                {
                    string Result = (string)myCommand.ExecuteScalar();