Added basic login

src/Artemis.WebClient.Workshop/Repositories/AuthenticationRepository.cs

@@ -0,0 +1,36 @@
+using Artemis.WebClient.Workshop.Entities;
+using LiteDB;
+
+namespace Artemis.WebClient.Workshop.Repositories;
+
+internal class AuthenticationRepository : IAuthenticationRepository
+{
+    private readonly LiteRepository _repository;
+
+    public AuthenticationRepository(LiteRepository repository)
+    {
+        _repository = repository;
+        _repository.Database.GetCollection<RefreshTokenEntity>().EnsureIndex(s => s.RefreshToken);
+    }
+
+    /// <inheritdoc />
+    public void SetRefreshToken(string? refreshToken)
+    {
+        _repository.Database.GetCollection<RefreshTokenEntity>().DeleteAll();
+
+        if (refreshToken != null)
+            _repository.Insert(new RefreshTokenEntity {RefreshToken = refreshToken});
+    }
+
+    /// <inheritdoc />
+    public string? GetRefreshToken()
+    {
+        return _repository.Query<RefreshTokenEntity>().FirstOrDefault()?.RefreshToken;
+    }
+}
+
+internal interface IAuthenticationRepository
+{
+    void SetRefreshToken(string? refreshToken);
+    string? GetRefreshToken();
+}