cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
		if s3Err != ErrNone {
			return cred, owner, s3Err
		}

		// we only support V4 (no presign) with auth body
		s3Err = isReqAuthenticated(ctx, r, region, serviceS3)
	}
	if s3Err != ErrNone {
		return cred, owner, s3Err
	}

	logger.GetReqInfo(ctx).Cred = cred
	logger.GetReqInfo(ctx).Owner = owner

	}
}

func checkAssumeRoleAuth(ctx context.Context, r *http.Request) (auth.Credentials, APIErrorCode) {
	if !isRequestSignatureV4(r) {
		return auth.Credentials{}, ErrAccessDenied
	}

	s3Err := isReqAuthenticated(ctx, r, globalSite.Region(), serviceSTS)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	user, _, s3Err := getReqAccessKeyV4(r, globalSite.Region(), serviceSTS)
	if s3Err != ErrNone {