How to get ShopId in a multi vendor ASP.NET Core 6 application?

Question

I'm using Entity Framework.

public class Store : IEntity<Guid>
{
    public Guid Id { get; set; }
    public string Handle { get; set; } //sub-domain
    public string StoreName { get; set; }
    public string? StoreUrl { get; set; } //main url            
}

This is the StoreDbContext

public class StoreDbContext : DbContext, IStoreDbContext
    {
        private readonly string _connectionString;
        private readonly string _assemblyName;

        public StoreDbContext(string connectionString, string assemblyName)
        {
            _connectionString = connectionString;
            _assemblyName = assemblyName;
        }
        protected override void OnConfiguring(DbContextOptionsBuilder optionBuilder)
        {
            if (!optionBuilder.IsConfigured)
            {
                optionBuilder.UseSqlServer(_connectionString, m => m.MigrationsAssembly(_assemblyName));
            }

            base.OnConfiguring(optionBuilder);
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder) {
            //many to many(prodcut to category)
            modelBuilder.Entity<ProductCategory>().HasKey(c => new { c.ProductId, c.CategoryId });
        
        public DbSet<STORE> Stores { get; set; }
    }

I have created a StoreInfoService. Here, I want to get StoreId via this method GetStoreId(). What should be my process?