Use GetConnectionCredentials() when checking credentials asynchronously
Use GetConnectionCredentials() when checking credentials asynchronously

Again, this avoids a time of check / time of use vulnerability.

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control