Micro User Service

Overview

The Micro User Service is a dedicated component within the broader Micro ecosystem, engineered for managing user identities and access control in modern distributed systems and microservices architectures. Its primary function is to provide a standardized and scalable solution for handling user-related operations, including registration, authentication, and permission management. This service is particularly suited for developers and organizations building complex applications that require granular control over user access across multiple independent services.

In a microservices environment, managing user state and authentication can introduce significant complexity due to the distributed nature of components. The Micro User Service addresses this by centralizing user data and authentication logic, allowing individual microservices to delegate these concerns rather than implementing them independently. This approach helps maintain consistency, reduce development overhead, and enhance security across the entire system. It integrates with other core Micro products, such as the Auth Service for token issuance and validation, and the API Gateway for routing and policy enforcement.

The service is designed to support common authentication flows, including traditional username/password methods and potentially integrating with external identity providers. It provides APIs for creating user accounts, verifying credentials, managing user profiles, and assigning roles or permissions. This enables developers to define access policies that dictate which users or groups can interact with specific services or resources. The Micro User Service is a foundational element for securing and organizing user interactions within applications built on the Micro platform, offering a unified experience for developers through its CLI and SDKs.

Organizations adopting microservices often face challenges related to consistent security and identity management across disparate services. The Micro User Service provides a framework to address these challenges, ensuring that user authentication and authorization are handled cohesively. This is critical for maintaining a secure posture and simplifying the operational aspects of a distributed application. For instance, the service can be used to implement role-based access control (RBAC), allowing administrators to define roles with specific permissions and assign them to users, thereby controlling access to specific API endpoints or data within the microservices architecture. This aligns with best practices for securing distributed systems, as outlined in resources like the Microservices architectural style discussion by Martin Fowler, which emphasizes decentralized governance but also highlights the need for consistent cross-cutting concerns like security.

Key features

• User Registration and Management: APIs for creating new user accounts, managing user profiles, and handling account lifecycle events.
• User Authentication: Support for various authentication mechanisms, including username/password, with integration into the broader Micro Auth Service for token-based authentication.
• Permission Management: Tools to define and assign roles and permissions, enabling granular access control to services and resources.
• Session Management: Capabilities for managing user sessions, including login, logout, and session expiration.
• Integration with Micro Platform: Seamless integration with other Micro services like the API Gateway and Auth Service for a unified distributed system experience.
• Go and JavaScript SDKs: Client libraries available for Go and JavaScript to facilitate development and interaction with the User Service.
• CLI Tools: Command-line interface for managing users, services, and the overall Micro environment.

Pricing

As of May 2026, Micro User Service is part of the Micro platform, which offers a free tier for Micro Cloud with limits on requests and data storage. For higher usage and advanced features, custom enterprise pricing is available. Specific details on enterprise pricing typically involve direct consultation with Micro sales to tailor a plan based on an organization's specific needs and scale.

For the most current pricing information and to discuss enterprise solutions, refer to the Micro User Service homepage.

Common integrations

• Micro Auth Service: Integrates for token issuance, validation, and managing authentication flows within the Micro platform. Refer to the Micro Auth Service documentation.
• Micro API Gateway: Works in conjunction with the gateway for routing authenticated requests and enforcing access policies before reaching backend microservices. See the Micro Gateway documentation.
• Micro Runtime: Deploys and manages the User Service as a component within the Micro distributed runtime environment. More details in the Micro Runtime documentation.
• Micro CLI: Utilizes the command-line interface for administrative tasks, user management, and service deployment. Explore the Micro CLI documentation.

Alternatives

• Auth0: A platform for authentication and authorization, offering a wide range of features for identity management and single sign-on.
• Okta: An identity and access management service providing secure access to applications and devices for employees and customers.
• Keycloak: An open-source identity and access management solution for modern applications and services, supporting standard protocols like OpenID Connect and SAML.

Getting started

To get started with the Micro User Service, you typically interact with it via the Micro CLI or one of its SDKs. The following Go example demonstrates how to create a new user using the Micro SDK, assuming the Micro environment is set up and the User Service is running.

package main

import (
	"context"
	"log"

	"go-micro.dev/v4/client"
	user "go-micro.dev/v4/service/user/proto"
)

func main() {
	// Create a new client
	client := client.NewClient()

	// Create a new user service client
	userService := user.NewUserService("user", client)

	// Call the Create method to register a new user
	resp, err := userService.Create(context.TODO(), &user.CreateRequest{
		Email:    "[email protected]",
		Password: "securepassword123",
		Username: "testuser",
	})

	if err != nil {
		log.Fatalf("Failed to create user: %v", err)
	}

	log.Printf("User created successfully: %s", resp.GetUser().GetId())
}

This Go snippet initializes a Micro client, then creates an instance of the User Service client. It then calls the Create method with an email, password, and username. This demonstrates a fundamental operation for integrating user management into a Micro-based application. For more detailed examples and advanced operations, consult the Micro User Service API reference.