/// <summary>
        /// Add organization owner.
        /// </summary>
        /// <param name="ownerId">the ID of a owner</param>
        /// <param name="orgId">the ID of an organization</param>
        /// <returns>created mapping</returns>
        public async Task <ResourceOwner> AddOwnerAsync(string ownerId, string orgId)
        {
            Arguments.CheckNonEmptyString(orgId, nameof(orgId));
            Arguments.CheckNonEmptyString(ownerId, nameof(ownerId));

            return(await _service.PostOrgsIDOwnersAsync(orgId, new AddResourceMemberRequestBody(ownerId)));
        }