You could try to disable the plugin that added the reCAPTCHA (in this case, Contact Form 7), so you can login again. Then, you can re-enable it and set your site and secret keys properly.
Since you are unable to login, you can’t disable the plugin from the WordPress dashboard. Instead you can temporarily move the plugin folder to another location. Navigate to the folder of your WordPress installation → wp-content
→ plugins
and move the contact-form-7
folder.