Azure Identity Rust

Credential Chain Order

Credential Types

ManagedIdentityCredential

For Azure-hosted resources:

use azure_identity::ManagedIdentityCredential;

// System-assigned managed identity
let credential = ManagedIdentityCredential::new(None)?;

// User-assigned managed identity
let options = ManagedIdentityCredentialOptions {
    client_id: Some("<user-assigned-mi-client-id>".into()),
    ..Default::default()
};
let credential = ManagedIdentityCredential::new(Some(options))?;

ClientSecretCredential

For service principal with secret:

use azure_identity::ClientSecretCredential;

let credential = ClientSecretCredential::new(
    "<tenant-id>".into(),
    "<client-id>".into(),
    "<client-secret>".into(),
    None,
)?;

Best Practices

1. Use DeveloperToolsCredential for local dev — automatically picks up Azure CLI
2. Use ManagedIdentityCredential in production — no secrets to manage
3. Clone credentials — credentials are Arc-wrapped and cheap to clone
4. Reuse credential instances — same credential can be used with multiple clients
5. Use tokio feature — cargo add azure_identity --features tokio

Reference Links

When to Use

This skill is applicable to execute the workflow or actions described in the overview.

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.