update login auth

src/controllers/auth.ts

@@ -36,7 +36,7 @@ export class AuthController {
         try {
             const schema = Joi.object().keys({
                 username: Joi.string().max(64).required().label('Username'),
-                password: Joi.string().alphanum().min(6).required().label('Password')
+                password: Joi.string().min(8).required().label('Password')
             });
 
             const param: User = await schema.validateAsync(req.body);