Problem z logowaniem.

Witam serdecznie forumowiczów. Mam problem z logowaniem. Za każym razem czy podam prawidłowy email i hasło lub nieprawidłowe nie mogę się zalogować i zwraca mi ze dane są nieprawidłowe " Invalid credentials" .. Kod logowania wstawiam poniżej :

Metoda z klasy User.php :

``function emailExists(){

    // query to check if email exists
    $query = "SELECT id, firstname, lastname, password
        FROM " . $this->table_name . "
        WHERE email = ?
        LIMIT 0,1";
    
    // prepare the query
    $stmt = $this->conn->prepare( $query );
    
    // sanitize
    $this->email=htmlspecialchars(strip_tags($this->email));
    
    // bind given email value
    $stmt->bindParam(1, $this->email);
    
    // execute the query
    $stmt->execute();
    
    // get number of rows
    $num = $stmt->rowCount();
    
    // if email exists, assign values to object properties for easy access and use for php sessions
    if($num>0){
        
        // get record details / values
        $row = $stmt->fetch(PDO::FETCH_ASSOC);
        
        // assign values to object properties
        $this->id = $row['id'];
        $this->firstname = $row['firstname'];
        $this->lastname = $row['lastname'];
        $this->password = $row['password'];
        
        // return true because email exists in the database
        return true;
    }
    
    // return false if email does not exist in the database
    return false;
}``

Plik Login:

ini_set("display_errors", 1);
// include vendor
require 'C:\xampp\htdocs\rest-api-authentication-example\vendor\autoload.php';
use \Firebase\JWT\JWT;

//include headers
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: POST");
header("Content-type: application/json; charset=utf-8");

// including files
include_once 'C:\xampp\htdocs\rest-api-authentication-example\api\config\database.php';
include_once 'C:\xampp\htdocs\rest-api-authentication-example\objects\user.php';

//objects
$database = new Database();
$db = $database->getConnection();

// instantiate product object
$user_obj = new User($db);

if($_SERVER['REQUEST_METHOD'] === "GET"){
    
    $data = json_decode(file_get_contents("php://input"));
    
    if(!empty($data->email) && !empty($data->password)){
        
        $email = $data->email;
        //$password = $data->password;
        
        $data = $user_obj->emailExists();
        
        if(!empty($data)){
            
            $firstname = $data['firstname'];
            $email = $data['email'];
            $password = $data['password'];
            
            
            
            if(password_verify($data->password, $password)){ // normal password, hashed password
                
                $iss = "localhost";
                $iat = time();
                $nbf = $iat + 10;
                $exp = $iat + 180;
                $aud = "users";
                $user_arr_data = array(
                    "id" => $data['id'],
                    "name" => $data['firstname'],
                    "email" => $data['email']
                );
                
                $secret_key = "owt125";
                
                $payload_info = array(
                    "iss"=> $iss,
                    "iat"=> $iat,
                    "nbf"=> $nbf,
                    "exp"=> $exp,
                    "aud"=> $aud,
                    "data"=> $user_arr_data
                );
                
                $jwt = JWT::encode($payload_info, $secret_key, 'HS512');
                
                http_response_code(200);
                echo json_encode(array(
                    "status" => 1,
                    "jwt" => $jwt,
                    "message" => "User logged in successfully"
                ));
            }else{
                
                http_response_code(404);
                echo json_encode(array(
                    "status" => 0,
                    "message" => "Invalid credentials"
                ));
            }
        }else{
            
            http_response_code(404);
            echo json_encode(array(
                "status" => 0,
                "message" => "Invalid credentials"
            ));
        }
    }else{
        
        http_response_code(404);
        echo json_encode(array(
            "status" => 0,
            "message" => "All data needed"
        ));
    }
}```

if($_SERVER['REQUEST_METHOD'] === "GET"){
    $data = json_decode(file_get_contents("php://input"));

Tak odczytujesz dane z metody post, a przesyłasz geta co jest **niedopuszczalne **przy tak wrażliwych danych jak dane logowania, więc $data jest puste i zwraca wiadomość o nieprawidłowych danych logowania

limit 0?