public async Task SeedAsync(IServiceProvider serviceProvider)
        {
            if (await _tenants.IgnoreQueryFilters().AnyAsync())
            {
                return;
            }

            var t1 = new Tenant {
                Id = "T20210602000001", Name = "租户一",
            };

            t1.AddConnectionStrings("Default", "Server=127.0.0.1,1433;Database=Pnct_T20210602000001;User Id=sa;Password=970307lBX;Trusted_Connection = False;");
            var t2 = new Tenant {
                Id = "T20210602000002", Name = "租户二",
            };

            t2.AddConnectionStrings("Default", "Server=127.0.0.1,1433;Database=Pnct_T20210602000002;User Id=sa;Password=970307lBX;Trusted_Connection = False;");
            await _tenants.InsertAsync(t1, true);

            await _tenants.InsertAsync(t2, true);
        }