asp.net core code first Cannot open database "DbName" requested by the login. The login failed

I have a asp.net core 3.1 code first project in Visual Studio 2019 and SQL Server 2017

It gives this exception when I make a request to the database: Cannot open database "DbName" requested by the login. The login failed. Login failed for user 'sa'.

It was in Log SQL server: Login failed for user 'NT Service\SSISScaleOutMaster150'. Reason: Could not find a login matching the name provided. [CLIENT: ]

I tried most of the solutions on the internet but none of them worked

Other info: Named pipes are enabled TCP/IP is enabled Remote connections are allowed I even removed the SQL server and reinstalled it and update Visual studio I tried this and this but didn't work

when i create database manually the exception changed to :Invalid object name 'User'.

connection string:

    "myconn": "Server=.;Database=onlineShopDB;User Id=sa;password=qazwsxedc;Trusted_Connection=False;MultipleActiveResultSets=true;"
  },

configure service:

        {

            services.AddMvc();
            services.AddDbContext<OnlineShopContext>(item => item.UseSqlServer(Configuration.GetConnectionString("myconn")));

            services.AddScoped<IDataRepository<User>, UserRepository>();
        
            services.AddControllersWithViews();
        }

repositoty class:

public class UserRepository : IDataRepository<User>
    {
        private readonly OnlineShopContext _onlineShopContext;
        public UserRepository(OnlineShopContext onlineShopContext)
        {
            _onlineShopContext = onlineShopContext;
        }

        public void Add(User entity)
        {
            _onlineShopContext.Users.Add(entity);
            _onlineShopContext.SaveChanges();
        }      
       
    }

IDataRepository:

 public interface IDataRepository<TEntity>
    {
        IEnumerable<TEntity> GetAll();
        TEntity Get(long id);
        void Add(TEntity entity);
        void Update(TEntity dbEntity, TEntity entity);
        void Delete(TEntity entity);
    }

onlineShopContext:

 public class OnlineShopContext:DbContext
    {
        public OnlineShopContext(DbContextOptions options):base(options)
        { }
        public virtual DbSet<UserType> UserTypes { get; set; }
        public virtual DbSet<User> Users { get; set; }
        public virtual DbSet<Category> Categories { get; set; }
        public virtual DbSet<Product> Products { get; set; }
        public virtual DbSet<ProductFeatures> ProductFeatures { get; set; }
        public virtual DbSet<ProductImages> GetProductImages { get; set; }
        public virtual DbSet<OrderStatus> OrderStatuses { get; set; }
        public virtual DbSet<Order> Orders { get; set; }
        public virtual DbSet<OrderItems> OrderItems { get; set; }

        protected override void OnModelCreating(ModelBuilder modelBuilder)  
        {
            modelBuilder.Entity<UserType>().HasData(
                new UserType() { Id = 1, Name = "User", Title = "a" },
                new UserType() { Id = 2, Name = "Admin", Title = "b" });

            
        }  
    }