Suppress warnings for obsolete members and update repo

Added warning suppression in `Program.cs` for obsolete user manager configuration. Marked `ClientUserRepository` as obsolete to encourage transition to the new `Repository` class.

DigitalData.UserManager.API/Program.cs

@@ -70,7 +70,9 @@ try {
     // Once the app is built, the password will be decrypted with Encryptor. lazy loading also acts as a call back method.
     Lazy<string>? cnn_str = null;
 
+#pragma warning disable CS0618 // Type or member is obsolete
     builder.Services.AddUserManager(options => options.UseSqlServer(cnn_str!.Value).EnableSensitiveDataLogging());
+#pragma warning restore CS0618 // Type or member is obsolete
 
     var allowedOrigins = builder.Configuration.GetSection("AllowedOrigins").Get<string[]>() ?? throw new InvalidOperationException("In appsettings there is no allowed origin.");
 

DigitalData.UserManager.Infrastructure/Repositories/ClientUserRepository.cs

@@ -6,6 +6,7 @@ using DigitalData.UserManager.Infrastructure.Contracts;
 
 namespace DigitalData.UserManager.Infrastructure.Repositories
 {
+    [Obsolete("Use Repository")]
     public class ClientUserRepository<TDbContext> : CRUDRepository<ClientUser, int, TDbContext>, IClientUserRepository
         where TDbContext : DbContext, IUserManagerDbContext
     {