API chaining with RestAssured

This below code snippet demonstrates how to use data  from one API response and reuse it in a subsequent request. It showcases a common authentication workflow where a token received from a login API is passed in the Authorization header to access a secured endpoint using RestAssured in Java.

🧪 Use Case:

This is a basic example of token-based authentication testing using REST APIs. It's useful in:

1. API automation frameworks

2.  Smoke tests for authentication flows.

3.  Demonstrating dynamic data chaining between API calls

🔄 Flow Summary:

1. Login Request (POST /api/login)
   Sends a JSON payload with email and password to Reqrest.
   Validates that:
   - Status code is 200 OK.
   - Response body contains a non-null "token".
   - Extracts the token from the response.

2.  Authenticated Request (GET /api/users/2)
   Adds the extracted token to the Authorization header in the format:
   Authorization: Bearer <token>
   - Sends a GET request to fetch user details.
   - Validates that the response status is 200 OK.
   - Prints the formatted JSON response.