TokenGenerator Api

A secure .NET 8.0 Web API for user registration, authentication, email verification, and 6-digit alphanumeric access token generation and validation.

• Presentation layer — TokenGenerator.Api
  Handles all HTTP requests and responses.

• Application logic layer — TokenGenerator.Application
  Contains the business logic, use case services, DTOs, and interfaces.

• Domain layer — TokenGenerator.Domain
  Defines core entities like User and Token

• Infrastructure & data access layer — TokenGenerator.Infrastructure
  Implements data persistence and external service integrations. Includes EF Core repositories, DbContext and MailKit email service.

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Features

• ✅ User registration with email confirmation via MailKit
• ✅ Secure login using JWT tokens
• ✅ Email verification with token expiry (max 24h)
• ✅ Generate 6-digit alphanumeric access tokens (valid for up to 3 days)
• ✅ Validate token ownership and expiry
• ✅ Update and delete user accounts securely
• ✅ Follows clean architecture (DTOs, services, repository pattern)
• ✅ Swagger UI with full OpenAPI documentation

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Technologies

• .NET Core Web API 8.0
• Entity Framework Core
• MailKit for sending email
• JWT (System.IdentityModel.Tokens.Jwt) for authentication
• AutoMapper
• Microsoft SQL Server
• Swagger / Swashbuckle

Getting Started

Clone the repo

gh repo clone VIbanichuka/TokenGenerator

Sensitive Data Disclaimer

This project intentionally excludes sensitive credentials and configuration data for security reasons. The following values have been removed and replaced with placeholders:

• Database connection string (appsettings.json):

  "ConnectionStrings": {
    "TokenGeneratorConnectionString": "server=INSERT YOUR SERVER INSTANCE;database=TokenGeneratorDB;Trusted_Connection=True;TrustServerCertificate=True"
  }

• Email configuration (MailKitEmailService.cs): Sender email and password for SMTP authentication:

  smtp.AuthenticateAsync("INSERT YOUR EMAIL", "INSERT YOUR APP PASSWORD");
  MailboxAddress.Parse(message.From ?? "INSERT YOUR EMAIL")
  

  Please ensure you replace these placeholder values with your actual credentials or via User Secrets for development, and environment variables or a secure secrets store for production use.