/// <summary>
/// Caches the user permission.
/// </summary>
/// <returns>The user permission.</returns>
/// <param name="permissionToken">Permission token.</param>
private async Task CacheUserPermission(PermissionToken permissionToken)
{
permissionToken.Id = permissionToken.UserId + "permission";
await Client.UpsertDocumentAsync(UriFactory.CreateDocumentCollectionUri(databaseId, collectionId), permissionToken);
}