优化组织和用户创建逻辑，简化插入数据结构并处理可选描述字段

src/auth/models/user-secret.ts

@@ -259,13 +259,19 @@ export class UserSecret {
       userId = tokenUser.uid;
       orgId = tokenUser.id;
     }
-    const inserted = await db.insert(userSecretsTable).values({
+    
+    const insertData: Partial<typeof userSecretsTable.$inferInsert> = {
       userId,
-      orgId,
       token,
       title: tokenUser.title || randomString(6),
       expiredTime: UserSecret.getExpiredTime(expireDays).toISOString(),
-    }).returning();
+    };
+    
+    if (orgId !== null && orgId !== undefined) {
+      insertData.orgId = orgId;
+    }
+    
+    const inserted = await db.insert(userSecretsTable).values(insertData).returning();
 
     return new UserSecret(inserted[0]);
   }