Added authentication and authorization, updated dependency injections, removed hard-coded connection string

SchengenVisaApi/Infrastructure/Database/Users/Repositories/UsersRepository.cs

@@ -0,0 +1,17 @@
+using ApplicationLayer.AuthServices.NeededServices;
+using Domains.Users;
+using Infrastructure.Database.Generic;
+using Microsoft.EntityFrameworkCore;
+
+namespace Infrastructure.Database.Users.Repositories
+{
+    /// <inheritdoc cref="IUsersRepository"/>
+    public class UsersRepository(IGenericReader reader, IGenericWriter writer, IUnitOfWork unitOfWork)
+        : GenericRepository<User>(reader, writer, unitOfWork), IUsersRepository
+    {
+        async Task<User?> IUsersRepository.FindByEmailAsync(string email, CancellationToken cancellationToken)
+        {
+            return await LoadDomain().SingleOrDefaultAsync(u => u.Email == email, cancellationToken);
+        }
+    }
+}