Add encrypted Etsy app credential settings

database/factories/EtsyAppCredentialFactory.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\EtsyAppCredential;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends Factory<EtsyAppCredential>
+ */
+class EtsyAppCredentialFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'keystring' => fake()->bothify('etsy-key-????????'),
+            'shared_secret' => fake()->sha256(),
+        ];
+    }
+}