chore: display token expiration for Application table in admin

Author: jaelee213

oauth2_provider/admin.py

@@ -7,7 +7,15 @@
 
 
 class ApplicationAdmin(admin.ModelAdmin):
-    list_display = ("id", "name", "user", "client_type", "authorization_grant_type")
+    list_display = (
+        "id", 
+        "name",
+        "user",
+        "access_token_expire_seconds",
+        "refresh_token_expire_seconds",
+        "client_type",
+        "authorization_grant_type",
+    )
     list_filter = ("client_type", "authorization_grant_type", "skip_authorization")
     radio_fields = {
         "client_type": admin.HORIZONTAL,