Cors Pre Flight Request

Describe the bug
i'm using spring cloud Hoxton.SR3 and spring boot 2.2.6.RELEASE.
i have a problem when using angular 2+ call to api-gateway : "Access to XMLHttpRequest at 'http://localhost:8080/auth/oauth/token' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource."
config api-gateway :
spring:
cloud:
gateway:
default-filters:
- DedupeResponseHeader=Access-Control-Allow-Credentials Access-Control-Allow-Origin
routes:
- id: auth-service
uri: lb://auth-service
predicates:
- Path=/auth/**
- id: product-service
uri: lb://product-service
predicates:
- Path=/product/**
- id: order-service
uri: lb://order-service
predicates:
- Path=/order/**
- id: payment-service
uri: lb://payment-service
predicates:
- Path=/payment/**
globalcors:
corsConfigurations:
'[/**]':
allowedOrigins: ""
allowedHeader: ""
allowCredentials: true
allowedMethods: "*"
add-to-simple-url-handler-mapping: true
i have tried add @CrossOrigin in gateway main class or add method Options in predicates in route[i] but it not work.
Please help me .
I think the problem lies in the version of the cloud

Start by reviewing the API gateway's supplied globalcors configuration and the Angular request to /auth/oauth/token, focusing on the preflight response. Reproduce the request and verify that the gateway returns the required Access-Control-Allow-Origin header and handles the configured OPTIONS request.