Emitted when a mount operation asks the user for a password.
If the message contains a line break, the first line should be presented as a heading. For example, it may be used as the primary text in
a GtkMessageDialog.
| message |
string containing a message to display to the user. |
| default_user |
string containing the default user name. |
| default_domain |
string containing the default domain. |
| flags |
a set of AskPasswordFlags. |