Unique user blocked

I received this two mails:

The first one:
“Dear Site Admin,
A host, 103.251.89.52, and a user, Aurora, have been locked out of the WordPress site at http://www.auroraghielmini.com due to too many bad login attempts.
The host has been locked out until 2014-05-31 11:06:25 and the user has been locked out until 2014-05-31 11:06:25.”

The second one:
“Dear Site Admin,
A user, Aurora, has been locked out of the WordPress site at http://www.auroraghielmini.com due to too many bad login attempts.
The user has been locked out until 2014-05-31 11:21:34.
To release the lockout please visit the lockouts page.
*This email was generated automatically by iThemes Security. To change your email preferences please visit the plugin settings.”

The problem is that Aurora is the only user that the site have, and I can’t enter the site anymore

What I have to do, now?

The site admin, Aurora 🙂

PS I can enter the site via FTP

https://wordpress.org/plugins/better-wp-security/