made everything a little bit easier to configure

etc/systemd/system/restic-backup.service

@@ -1,10 +1,12 @@
 [Unit]
-Description=Backup with restic to Backblaze B2
+Description=Backup with restic
 OnFailure=status-email-user@%n.service
 
 [Service]
 Type=simple
 Nice=10
+User=lerentis
 ExecStart=/usr/local/sbin/restic_backup.sh
 # $HOME or $XDG_CACHE_HOME must be set for restic to find /root/.cache/restic/
-Environment="HOME=/home/lerentis/"
+Environment="HOME=/home/lerentis/"
+Environment=SSH_AUTH_SOCK=%t/ssh-agent.socket

etc/systemd/system/restic-check.service

@@ -1,9 +1,12 @@
 [Unit]
-Description=Check restic backup Backblaze B2 for errors
+Description=Check restic backup for errors
 OnFailure=status-email-user@%n.service
 Conflicts=restic.service
 
 [Service]
 Type=simple
+User=lerentis
 Nice=10
 ExecStart=/usr/local/sbin/restic_check.sh
+Environment="HOME=/home/lerentis/"
+Environment=SSH_AUTH_SOCK=%t/ssh-agent.socket

etc/systemd/system/status-email-user@.service

@@ -1,8 +1,5 @@
-# Source: https://serverfault.com/questions/876233/how-to-send-an-email-if-a-systemd-service-is-restarted
-# Source: https://wiki.archlinux.org/index.php/Systemd/Timers#MAILTO
-
 [Unit]
-Description=Send status email for %i to user
+Description=Send status popup for %i to user
 
 [Service]
 Type=oneshot