Filters the user action description.

Filters the text of the email sent when an account action is attempted.

Filters the headers of the email sent when an account action is attempted.

Filters the subject of the email sent when an account action is attempted.

Filters the body of the user request confirmation email.

Filters the headers of the user request confirmation email.

Filters the subject of the user request confirmation email.

Filters the recipient of the data request confirmation notification.

Filters the expiration time of confirm keys.

Filters whether the given username exists.