Refactor rate limiter and datetime formatting

src/ddns_service/cli.py

@@ -3,6 +3,7 @@
 import getpass
 import logging
 
+from . import datetime_str
 from .cleanup import cleanup_expired
 from .models import (
     DoesNotExist,
@@ -27,7 +28,7 @@ def cmd_user_list(args, app):
         hostname_count = Hostname.select().where(
             Hostname.user == user
         ).count()
-        created_at = user.created_at.strftime("%Y-%m-%d %H:%M:%S")
+        created_at = datetime_str(user.created_at)
 
         print(
             f"{user.username:<20} {user.email:<30} "
@@ -153,8 +154,8 @@ def cmd_hostname_list(args, app):
     )
     print("-" * 132)
     for h in hostnames:
-        last_ipv4_update = h.last_ipv4_update.strftime("%Y-%m-%d %H:%M:%S") if h.last_ipv4_update else "Never"
-        last_ipv6_update = h.last_ipv6_update.strftime("%Y-%m-%d %H:%M:%S") if h.last_ipv6_update else "Never"
+        last_ipv4_update = datetime_str(h.last_ipv4_update) if h.last_ipv4_update else "Never"
+        last_ipv6_update = datetime_str(h.last_ipv6_update) if h.last_ipv6_update else "Never"
         print(
             f"{h.hostname:<35} {h.user.username:<15} {h.zone:<20} "
             f"{h.dns_ttl:<8} {h.expiry_ttl:<8} {last_ipv4_update:<21} {last_ipv6_update}"