Also add no budget and no category overview.

app/Models/UserGroup.php

@@ -76,6 +76,14 @@ class UserGroup extends Model
         return $this->hasMany(Account::class);
     }
 
+    /**
+     * Link to accounts.
+     */
+    public function periodStatistics(): HasMany
+    {
+        return $this->hasMany(PeriodStatistic::class);
+    }
+
     /**
      * Link to attachments.
      */