User Authentication Service

A simple user authentication service written in Go, using SQLite for data storage. The service supports user registration, login, account deletion, and password change functionalities.

Features

• User Registration: Allows new users to register with a username and password.
• User Login: Authenticates users with their username and password.
• Delete Account: Allows users to delete their account by providing their username and password.
• Change Password: Allows users to change their password after providing their current password.

Technologies

• Golang
• SQLite
• bcrypt
• Gorilla Mux

Setup

1. Clone the Repository

   git clone https://github.com/kaynhvh/registerlogin.git
   cd registerlogin

2. Install Dependencies

   Ensure you have Go installed on your system. Install the necessary Go packages:

   go mod tidy

3. Initialize the Database

   The application initializes the SQLite database automatically upon startup. Ensure the directory where the database file will be created has appropriate write permissions.

4. Run the Application

   Start the server with the following command:

   make run

   The server will be accessible at http://localhost:8080.

API Endpoints

Register User

• URL: /register

• Method: POST

• Request Body:

  {
    "username": "string",
    "password": "string"
  }

• Success Response:

  • Code: 201 Created

  • Content:

    {
      "message": "User registered successfully"
    }

• Error Response:

  • Code: 400 Bad Request or 409 Conflict (for username already taken)

Login User

• URL: /login

• Method: POST

• Request Body:

  {
    "username": "string",
    "password": "string"
  }

• Success Response:

  • Code: 200 OK

  • Content:

    {
      "message": "Login successful"
    }

• Error Response:

  • Code: 401 Unauthorized (for invalid credentials)

Delete Account

• URL: /delete

• Method: DELETE

• Request Body:

  {
    "username": "string",
    "password": "string"
  }

• Success Response:

  • Code: 204 No Content

  • Content:

    {
      "message": "Successfully deleted",
      "username": "string"
    }

• Error Response:

  • Code: 400 Bad Request or 401 Unauthorized (for invalid password) or 404 Not Found (for user not found)

Change Password

• URL: /change-password

• Method: PUT

• Request Body:

  {
    "username": "string",
    "old_password": "string",
    "new_password": "string"
  }

• Success Response:

  • Code: 200 OK

  • Content:

    {
      "message": "Password changed successfully"
    }

• Error Response:

  • Code: 400 Bad Request or 401 Unauthorized (for invalid old password)