feat: implement tenant OAuth flow and guest achievements

app/Models/OAuthCode.php

@@ -8,9 +8,11 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 class OAuthCode extends Model
 {
     protected $table = 'oauth_codes';
-    
+
+    public $timestamps = false;
+
     protected $guarded = [];
-    
+
     protected $fillable = [
         'id',
         'client_id',
@@ -22,22 +24,22 @@ class OAuthCode extends Model
         'scope',
         'expires_at',
     ];
-    
+
     protected $casts = [
         'expires_at' => 'datetime',
         'created_at' => 'datetime',
     ];
-    
+
     public function client(): BelongsTo
     {
         return $this->belongsTo(OAuthClient::class, 'client_id', 'client_id');
     }
-    
+
     public function user(): BelongsTo
     {
         return $this->belongsTo(User::class);
     }
-    
+
     public function isExpired(): bool
     {
         return $this->expires_at < now();