Use agent during verification

src/freedombone-utils-backup

         exit 8352925
     fi
     if [[ $ENABLE_BACKUP_VERIFICATION == "yes" ]]; then
-        echo "$BACKUP_DUMMY_PASSWORD" | duplicity verify --gpg-options "$BACKUP_GPG_OPTIONS" --tempdir $BACKUP_TEMP_DIRECTORY --encrypt-key $MY_BACKUP_KEY_ID --full-if-older-than 4W --exclude-other-filesystems ${1} file://$USB_MOUNT/backup/${2}
+        echo "$BACKUP_DUMMY_PASSWORD" | duplicity verify --use-agent --gpg-options "$BACKUP_GPG_OPTIONS" --tempdir $BACKUP_TEMP_DIRECTORY --encrypt-key $MY_BACKUP_KEY_ID --full-if-older-than 4W --exclude-other-filesystems ${1} file://$USB_MOUNT/backup/${2}
         if [ ! "$?" = "0" ]; then
             umount $USB_MOUNT
             rm -rf $USB_MOUNT
         exit 5293526
     fi
     if [[ $ENABLE_BACKUP_VERIFICATION == "yes" ]]; then
-        echo "$BACKUP_DUMMY_PASSWORD" | duplicity verify --gpg-options "$BACKUP_GPG_OPTIONS" --tempdir $BACKUP_TEMP_DIRECTORY --ssh-askpass --encrypt-key ${ADMIN_BACKUP_KEY_ID} --full-if-older-than 4W --exclude-other-filesystems ${1} $SERVER_DIRECTORY/backup/${2}
+        echo "$BACKUP_DUMMY_PASSWORD" | duplicity verify --use-agent --gpg-options "$BACKUP_GPG_OPTIONS" --tempdir $BACKUP_TEMP_DIRECTORY --ssh-askpass --encrypt-key ${ADMIN_BACKUP_KEY_ID} --full-if-older-than 4W --exclude-other-filesystems ${1} $SERVER_DIRECTORY/backup/${2}
         if [ ! "$?" = "0" ]; then
             if [[ ${1} == "/root/temp"* || ${1} == *"tempbackup" ]]; then
                 shred -zu ${1}/*