How to create directory using username within theme

Note – User needs to be logged in to work

global $current_user;
get_currentuserinfo();
$uploaddir="./uploads/file/".$current_user->user_login."https://wordpress.stackexchange.com/"; 
wp_mkdir_p( $uploaddir );

Reference – wp_mkdir_p()

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)