GO Auth

This an example of API with authentication in Go. It gives some separation of concerns by organizing the layers into different packages, isolating the capabilities on their own files, and abstracting the dependencies using design patterns. All dependencies are interpreted in the main.go file.

Libraries used:

• Gin for the API.
• JWT for generating authorization token.
• MongoDB Client for database connection.

The application is capable of creating, authorizing, and updating users. All the operations are logged in the database and can be also retrieved in the API.

You can run everything via docker compose.

Prerequisites

• Docker installed on your machine

Setting Up the Application

Firstly, you need to create a .env file in the root folder containing:

DB_URI=mongodb://appmongo1:27017
DB_REPLICA_SET=myReplicaSet
JWT_SECRET=<YOUR_TOKEN_SECRET_HERE>

You can change the details of DB_URI and DB_REPLICA_SET as needed.

Then, build the API and MongoDB cluster by running then via docker compose:

docker compose up -d

Using the application

Creating an user

POST http://localhost:8080/users/
{
    "email": "test@test.com",
    "password": "nicepassword",
    "confirmPassword": "nicepassword",
    "name": "wow nice name"
}

Authenticating an user

POST http://localhost:8080/authenticate/
{
    "email": "test@test.com",
    "password": "nicepassword"
}

This should return the token and id that you can use to access the API.

Authorizing an user

Add an HTTP Authorization header with the format Bearer {token}

Fetching logged-in user info

GET http://localhost:8080/me
HEADER Autorization: Bearer {token}

Returns the details of the logged-in user.

Fetching user logs

GET http://localhost:8080/users/{id}/logs
HEADER Authorization: Bearer {token}

Returns the logs for the specified user.