reorganize and cleanup php server code

server/app/Http/Requests/Auth/Social/ApiAuthenticateRequest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Vanguard\Http\Requests\Auth\Social;
+
+use Illuminate\Validation\Rule;
+use Vanguard\Http\Requests\Request;
+
+class ApiAuthenticateRequest extends Request
+{
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'network' => [
+                'required',
+                Rule::in(config('auth.social.providers'))
+            ],
+            'social_token' => 'required',
+            'device_name' => 'required',
+        ];
+    }
+}