Java tutorial
package org.springframework.security.oauth2.common.exceptions; /** * Exception thrown when a user was unable to authenticate. * * @author Dave Syer */ @SuppressWarnings("serial") public class UnauthorizedUserException extends OAuth2Exception { public UnauthorizedUserException(String msg, Throwable t) { super(msg, t); } public UnauthorizedUserException(String msg) { super(msg); } @Override public int getHttpErrorCode() { // The spec says this can be unauthorized return 401; } @Override public String getOAuth2ErrorCode() { // Not in the spec return "unauthorized_user"; } }