Description of problem:

Cockpit is unable to cancel a scheduled reboot via DBus with the following error:

Failed to cancel shutdown Interactive authentication required

Cockpit calls the following dbus command, but via it cockpit itself.

busctl call org.freedesktop.login1 /org/freedesktop/login1  org.freedesktop.login1.Manager CancelScheduledShutdown

Version-Release number of selected component (if applicable):

The last known good version is v250.3-6.fc37, the first v251 version breaks. 

How reproducible:

Always

Steps to Reproduce:
1. Schedule a reboot in cockpit as administrator (with adminstrative access). (Click reboot => shows a dialog schedule for X minutes)
2. Notice that the "Health card" has a cancel shutdown button
3. Click the cancel shutdown button

Actual results:

Failed to cancel shutdown Interactive authentication required

Expected results:

No error, reboot cancelled.

Additional info:

Monitoring with:

busctl monitor org.freedesktop.login1.Manager

Shows the following:

‣ Type=method_return  Endian=l  Flags=1  Version=1 Cookie=-1  ReplyCookie=2009  Timestamp="Mon 2022-05-02 13:37:13.555384 UTC"
  Sender=org.freedesktop.DBus  Destination=:1.46
  MESSAGE "u" {
          UINT32 1782;
  };

‣ Type=method_return  Endian=l  Flags=1  Version=1 Cookie=2010  ReplyCookie=360  Timestamp="Mon 2022-05-02 13:37:13.556330 UTC"
  Sender=:1.46  Destination=:1.4
  UniqueName=:1.46
  MESSAGE "(bba{ss})" {
          STRUCT "bba{ss}" {
                  BOOLEAN false;
                  BOOLEAN true;
                  ARRAY "{ss}" {
                          DICT_ENTRY "ss" {
                                  STRING "polkit.retains_authorization_after_challenge";
                                  STRING "1";
                          };
                  };
          };
  };

‣ Type=error  Endian=l  Flags=1  Version=1 Cookie=361  ReplyCookie=1339  Timestamp="Mon 2022-05-02 13:37:13.557643 UTC"
  Sender=:1.4  Destination=:1.41
  ErrorName=org.freedesktop.DBus.Error.InteractiveAuthorizationRequired  ErrorMessage="Interactive authentication required."
  UniqueName=:1.4
  MESSAGE "s" {
          STRING "Interactive authentication required.";
  };