This project is a user authentication microservice built with Go (Golang) using gRPC and Protocol Buffers. It demonstrates secure user registration and login, JWT-based authentication, password hashing with bcrypt, and rate limiting middleware.

• gRPC service definitions for user registration and login
• JWT token generation and validation
• Password hashing with bcrypt
• Rate limiting middleware
• Example Go client
• Simple HTML web client for testing

• Go (Golang)
• gRPC
• Protocol Buffers
• JWT (github.com/golang-jwt/jwt/v5)
• bcrypt (golang.org/x/crypto/bcrypt)
• Rate Limiting (golang.org/x/time/rate)

proto/   # Protocol Buffers (.proto) files
de server/   # Go gRPC server implementation
client/  # Go client example
web/     # Simple HTML client

• Go (v1.18+ recommended)
• protoc (Protocol Buffers compiler)
• protoc-gen-go and protoc-gen-go-grpc

go mod tidy

protoc --go_out=. --go-grpc_out=. proto/user.proto

go run server/main.go

go run client/main.go

Open web/index.html in your browser and follow the instructions.

• Built with Go (Golang)
• gRPC, Protocol Buffers, JWT, bcrypt, and rate limiting libraries

Author: [Imaad]

This project is for educational/demo purposes. Contributions welcome!