我正在使用来自前端（angular）的社交媒体身份验证，并希望使用该代码为后端提供访问权限，因此我需要在服务文件中生成自定义oauth2承载令牌。可以使用tokenservice自动连接生成令牌，代码如下：

OAuth2Authentication authenticationRequest = new OAuth2Authentication(authorizationRequest,
            authenticationToken);
    authenticationRequest.setAuthenticated(true);

OAuth2AccessToken accessToken = ((AuthorizationServerTokenServices) tokenService)
            .createAccessToken(authenticationRequest);

String token = accessToken.getValue().toString();

但它给了我下面的错误和应用程序无法进一步启动。

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APPLICATION FAILED TO START

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Description:

Field tokenService in com.demo.sasserver.service.UserLoginService required a bean of type 'org.springframework.security.core.token.TokenService' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)
    - @org.springframework.beans.factory.annotation.Qualifier(value="myAuthenticationManager")

Action:

Consider defining a bean of type 'org.springframework.security.core.token.TokenService' in your configuration.```