public static async Task DeleteRelatedOrganisation(string connectionString, RelatedOrganisation relatedOrganisation)
        {
            var query = "DELETE FROM dbo.RelatedOrganisations WHERE OrganisationId = @organisationId AND RelatedOrganisationId = @relatedOrganisationId;";

            await SqlExecutor.ExecuteAsync <RelatedOrganisation>(connectionString, query, new { organisationId = relatedOrganisation.OrganisationId, relatedOrganisationId = relatedOrganisation.RelatedOrganisationId });
        }
 public static async Task AddRelatedOrganisation(string connectionString, RelatedOrganisation relatedOrganisation)
 {
     var query = "INSERT INTO dbo.RelatedOrganisations (OrganisationId, RelatedOrganisationId) VALUES (@organisationId, @relatedOrganisationId);";
     await SqlExecutor.ExecuteAsync <RelatedOrganisation>(connectionString, query, new { organisationId = relatedOrganisation.OrganisationId, relatedOrganisationId = relatedOrganisation.RelatedOrganisationId });
 }