How do I count query result rows?

What should I replace 'CODE TO VERIFY IF QUERY RESULT ROW IS = 1' for? I've tried many ways using num_rows but it won't work. My PHP code: ``` $con=mysqli_connect("localhost","mbrconsu_un394x","y1cz9,rd+hf6","mbrconsu_mmx"); if (mysqli_connect_errno($con)) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); } $usuario = $con->real_escape_string($_GET['usuario']); $senha = $con->real_escape_string($_GET['senha']); $query = mysqli_query($con, "SELECT * FROM 'login' WHERE usuario = '$usuario' AND senha='$senha'"); if(CODE TO VERIFY IF QUERY RESULT ROW IS = 1){ while($row = mysqli_fetch_assoc($query)){ $db_username = $row['usuario']; $db_password = $row['senha']; } if($usuario == $db_username && $senha == $db_password){ return true; } } else { return false; } mysqli_close($con); ?> ```