SPMS_API/SPMS.Application/DependencyInjection.cs

using Microsoft.Extensions.DependencyInjection;
using SPMS.Application.Interfaces;
using SPMS.Application.Services;

namespace SPMS.Application;

public static class DependencyInjection
{
    public static IServiceCollection AddApplication(this IServiceCollection services)
    {
        // Application Services
        services.AddScoped<IAuthService, AuthService>();

        return services;
    }
}