spring security oauth2 change default prefix path

when add oauth to your project 

oauth library create some endpoint for get token .get authorize code ,get refresh token and some other oauth protocol

this endpoint has rest url s in this url

Mapped "{[/oauth/authorize]}

Mapped "{[/oauth/token],methods=[GET]}"

Mapped "{[/oauth/check_token]}"

,..

when your project run in root servlet-path every thing is ok .but when using servlet-path:/api or other name 

request to /api/oauth/token for get token is get exception

for solve this problem need to change default configuration for oauth path for change it nee write this configuration code

@Override

public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {

          endpoints.prefix("/api").authenticationManager(authenticationManager).userDetailsService(userDetailsService).

          accessTokenConverter(jwtAccessTokenConverter());

}