Spring-Security-Oauth2: Full authentication is required to access this resource

I am trying to use spring-security-oauth2.0 with Java based configuration. My configuration is done, but when i deploy application on tomcat and hit the /oauth/token url for access token, Oauth generate the follwoing error:

<error_description>Full authentication is required to access this resource</error_description>

My configuration is on Git hub, please click on link

The code is large, so refer to git. I am using chrome postman client for send request. follwing is my request.

POST /dummy-project-web/oauth/token HTTP/1.1
Host: localhost:8081
Cache-Control: no-cache
Content-Type: application/x-www-form-urlencoded


The error is just like, the URL is secure by Oauth, but in configuration, i give the all permission for access this URL. What actual this problem is?

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