This Node.js application provides a simple arithmetic operation API protected by JWT (JSON Web Tokens) authentication. Clients can perform basic arithmetic operations (addition, subtraction, multiplication, division) on two numbers after authenticating themselves.

• User authentication using JWT tokens
• API endpoints for addition, subtraction, multiplication, and division
• Swagger documentation for easy API reference
• Refresh token mechanism for obtaining new access tokens

1. Clone the repository:

   git clone https://github.com/Duyoofmp/arithmetic-api.git
   

2. Navigate to the project directory:

    cd arithmetic-api
   

3. Install dependencies:

   npm install
   

1. Start the server: change directory to src folder then:

   node app.js

2. Access the Swagger documentation by navigating to http://localhost:3000/api-docs in your web browser.

3. Register a user or use the provided dummy user credentials to authenticate and obtain JWT tokens.

4. Use the provided JWT token for authorization in API requests to perform arithmetic operations.

• Login POST /auth/login - Authenticate and obtain JWT tokens (access token and refresh token).
• Refresh POST /auth/refresh - Refresh the access token using the refresh token.
• Addition POST /api/arithmetic/add - Perform addition operation.
• Subtraction POST /api/arithmetic/subtract - Perform subtraction operation.
• Multiplication POST /api/arithmetic/multiply - Perform multiplication operation.
• Division POST /api/arithmetic/divide - Perform division operation.

```bash
    Username: user
    Password: password