public static TenantResolutionBuilder Then <T, TOptions>(
     this TenantResolutionBuilder builder, TOptions options)
 {
     builder.UseMiddleware <T>(options);
     return(builder);
 }
 public static TenantResolutionBuilder Then <T>(
     this TenantResolutionBuilder builder)
 {
     builder.UseMiddleware <T>();
     return(builder);
 }