Project 063 – User Authentication API (Actix-Web)

What I Built

A basic user authentication API with login and signup endpoints using in-memory storage. While practicing password hashing, POST data handling, and secure API logic, a key step for secure web applications.

What I Learned

• bcrypt for password hashing & verification

• Mutex<HashMap> for safe shared user state

Notes

Run the Server

cargo run

Test It with curl:

1. Sign up:

curl -X POST -H "Content-Type: application/json" \
-d '{"username":"alice", "password":"secret123"}' \
http://127.0.0.1:8080/signup

2. Log in:

curl -X POST -H "Content-Type: application/json" \
-d '{"username":"alice", "password":"secret123"}' \
http://127.0.0.1:8080/login