Add encrypted Etsy app credential settings

app/Models/EtsyAppCredential.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models;
+
+use Database\Factories\EtsyAppCredentialFactory;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class EtsyAppCredential extends Model
+{
+    /** @use HasFactory<EtsyAppCredentialFactory> */
+    use HasFactory;
+
+    protected $fillable = ['keystring', 'shared_secret'];
+
+    protected $hidden = ['keystring', 'shared_secret'];
+
+    protected function casts(): array
+    {
+        return [
+            'keystring' => 'encrypted',
+            'shared_secret' => 'encrypted',
+        ];
+    }
+}

app/Models/EtsyConnection.php

@@ -8,6 +8,8 @@ class EtsyConnection extends Model
 {
     protected $fillable = ['shop_id', 'shop_name', 'access_token', 'refresh_token', 'expires_at'];
 
+    protected $hidden = ['access_token', 'refresh_token'];
+
     protected function casts(): array
     {
         return [