return
	}

	claims[expClaim] = UTCNow().Add(duration).Unix()
	claims[parentClaim] = user.AccessKey

	tokenRevokeType := r.Form.Get(stsRevokeTokenType)
	if tokenRevokeType != "" {
		claims[tokenRevokeTypeClaim] = tokenRevokeType
	}

	// Validate that user.AccessKey's policies can be retrieved - it may not
	// be in case the user is disabled.

// 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).

			continue
		}
		if tokenRevokeType != "" {
			claims, err := getClaimsFromTokenWithSecret(ui.Credentials.SessionToken, secret)
			if err != nil {
				continue // skip if token is invalid
			}
			// skip if token type is given and does not match
			if v, _ := claims.Lookup(tokenRevokeTypeClaim); v != tokenRevokeType {
				continue
			}
		}