// RevokeTokens - revokes all STS tokens, or those of specified type, for a user
// If `tokenRevokeType` is empty, all tokens are revoked.
func (sys *IAMSys) RevokeTokens(ctx context.Context, accessKey, tokenRevokeType string) error {
	if !sys.Initialized() {
		return errServerNotInitialized
	}

	return sys.store.RevokeTokens(ctx, accessKey, tokenRevokeType)
}

// DeleteUser - delete user (only for long-term users not STS users).

		assumeRole := cr.STSAssumeRole{
			Client:      s.TestSuiteCommon.client,
			STSEndpoint: s.endPoint,
			Options: cr.STSAssumeRoleOptions{
				AccessKey:       accessKey,
				SecretKey:       secretKey,
				TokenRevokeType: tc.tokenType,
			},
		}

		value, err := assumeRole.Retrieve()
		if err != nil {
			c.Fatalf("err calling assumeRole: %v", err)
		}

		minioClient, err := minio.New(s.endpoint, &minio.Options{