store.loadUser(ctx, accessKey, svcUser, cache.iamUsersMap)
		var svc UserIdentity
		svc, found = cache.iamUsersMap[accessKey]
		if found {
			// Load parent user and mapped policies.
			if store.getUsersSysType() == MinIOUsersSysType {
				store.loadUser(ctx, svc.Credentials.ParentUser, regUser, cache.iamUsersMap)
				store.loadMappedPolicyWithRetry(ctx, svc.Credentials.ParentUser, regUser, false, cache.iamUserPolicyMap, 3)