1# Authentication — Rust SDK Quick Reference
2 
3> Condensed from **azure-identity-rust**. Full patterns (ClientSecret,
4> ClientCertificate, WorkloadIdentity, AzurePipelines credentials)
5> in the **azure-identity-rust** plugin skill if installed.
6 
7## Install
8cargo add azure_identity
9 
10## Quick Start
11```rust
12use azure_identity::DeveloperToolsCredential;
13let credential = DeveloperToolsCredential::new(None)?;
14```
15 
16## Best Practices
17- Use DeveloperToolsCredential for local dev — automatically picks up Azure CLI
18- Use ManagedIdentityCredential in production — no secrets to manage
19- Clone credentials — credentials are Arc-wrapped and cheap to clone
20- Reuse credential instances — same credential can be used with multiple clients
21- Use tokio feature — `cargo add azure_identity --features tokio`
22