function verify_Username_and_pass($un, $pwd){

			$query = "SELECT *
					FROM users
					WHERE username = ? AND password = ?
					LIMIT 1";

			if($stmt = $this->conn->prepare($query)){
				$stmt->bind_param('ss', $un, $pwd);
				$result = $stmt->execute();

				if($stmt->num_rows>0){
					$stmt->close();
					return true;
				}
			}
		} //end verify_Username_and_pass