无法使用SpringBoot-Oauth2从第三方服务器获取访问令牌

Question

无论我尝试什么配置，我总是得到：

我正在使用oauth2-vanilla中的示例：oauth2-vanilla example

但是我在尝试登录时遇到以下异常：

    2016-11-19 21:26:06.187 DEBUG 2753 --- [nio-5000-exec-4] o.s.web.client.RestTemplate              : Created POST request for "https://api.fablabs.io/oauth/token"
2016-11-19 21:26:06.187 DEBUG 2753 --- [nio-5000-exec-4] g.c.AuthorizationCodeAccessTokenProvider : Encoding and sending form: {grant_type=[authorization_code], code=[737a5cedc764e74ddcb75bf6833516fb6fba8c20ae568fd4936e2a616fe0c30c], redirect_uri=[http://localhost:5000/login], client_id=[62c5dd374d13a7ec6469641433e20648c9cab3f10a643c5f4f55b35f11cae307], client_secret=[b98fe2e6d9214674ab25e82c5065c9aa87d61d1bd6f35f9f6ddc44aeb60f2c95]}
2016-11-19 21:26:06.639 DEBUG 2753 --- [nio-5000-exec-4] o.s.web.client.RestTemplate              : POST request for "https://api.fablabs.io/oauth/token" resulted in 403 (Forbidden); invoking error handler
2016-11-19 21:26:06.641 DEBUG 2753 --- [nio-5000-exec-4] o.s.b.a.audit.listener.AuditListener     : AuditEvent [timestamp=Sat Nov 19 21:26:06 PET 2016, principal=UNKNOWN, type=AUTHENTICATION_FAILURE, data={type=org.springframework.security.authentication.BadCredentialsException, message=Could not obtain access token}]
2016-11-19 21:26:06.644 DEBUG 2753 --- [nio-5000-exec-4] uth2ClientAuthenticationProcessingFilter : Authentication request failed: org.springframework.security.authentication.BadCredentialsException: Could not obtain access token

这是我的UI服务器的application.yml：

server:
  port: 5000
  tomcat:
    remote_ip_header: x-forwarded-for
    protocol_header: x-forwarded-proto

debug: true

spring:
  aop:
    proxy-target-class: true

security:
  oauth2:
    client:
      accessTokenUri: https://api.fablabs.io/oauth/token
      userAuthorizationUri: https://api.fablabs.io/oauth/authorize
      clientId: 62c5dd374d13a7ec6469641433e20648c9cab3f10a643c5f4f55b35f11cae307
      clientSecret: b98fe2e6d9214674ab25e82c5065c9aa87d61d1bd6f35f9f6ddc44aeb60f2c95
      clientAuthenticationScheme: form
    resource:
      userInfoUri: https://api.fablabs.io/v0/me.json

zuul:
  routes:
    resource:
      path: /resource/**
      url: http://localhost:9000
    user:
      path: /user/**
      url: https://api.fablabs.io/v0/me.json

logging:
  level:
    org.springframework.security: DEBUG
    org.springframework.web: DEBUG

可能有什么不对？使用Auth服务器可能是cookie，https，CSRF的问题？我不知道如何验证这一点。请给我一些帮助。

显然OAuth2 provider对其他客户端没有问题，但是没有使用我的Java客户端。 我在使用Github和Google API Oauth2端点时成功获得了Access Token。那么，这里可能出现什么问题???