feat: user managment system functionality by ai

.gitignore

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+node_modules
+.env
+*.log

NiravThumar/database_schema.md

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+# Database Schema Design
+
+## Overview
+This document outlines the database schema for the User Management System with Role-Based Access Control. The schema consists of two main collections: Users and Roles.
+
+## Users Collection
+
+### Fields
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| _id | ObjectId | Yes | Unique identifier for the user |
+| email | String | Yes | User's email address (unique) |
+| password_hash | String | Yes | Hashed password |
+| role_id | ObjectId | Yes | Reference to the role assigned to the user |
+| first_name | String | No | User's first name |
+| last_name | String | No | User's last name |
+| created_at | Date | Yes | Timestamp when the user was created |
+| updated_at | Date | Yes | Timestamp when the user was last updated |
+| last_login | Date | No | Timestamp of the last successful login |
+
+### Indexes
+- email (unique)
+- role_id
+
+## Roles Collection
+
+### Fields
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| _id | ObjectId | Yes | Unique identifier for the role |
+| name | String | Yes | Role name (unique) |
+| description | String | No | Description of the role |
+| permissions | Array | No | List of permissions associated with the role |
+| created_at | Date | Yes | Timestamp when the role was created |
+| updated_at | Date | Yes | Timestamp when the role was last updated |
+
+### Indexes
+- name (unique)
+
+## Relationships
+- Users have a many-to-one relationship with Roles (many users can have the same role)
+- Roles can be assigned to multiple users
+
+## Sample Documents
+
+### User Document
+```json
+{
+  "_id": ObjectId("507f1f77bcf86cd799439011"),
+  "email": "john.doe@example.com",
+  "password_hash": "$2b$10$examplehashedpassword",
+  "role_id": ObjectId("507f191e810c19729de860ea"),
+  "first_name": "John",
+  "last_name": "Doe",
+  "created_at": ISODate("2023-01-01T00:00:00Z"),
+  "updated_at": ISODate("2023-01-01T00:00:00Z"),
+  "last_login": ISODate("2023-01-01T00:00:00Z")
+}
+```
+
+### Role Document
+```json
+{
+  "_id": ObjectId("507f191e810c19729de860ea"),
+  "name": "admin",
+  "description": "Administrator with full access",
+  "permissions": ["user:create", "user:read", "user:update", "user:delete", "role:assign"],
+  "created_at": ISODate("2023-01-01T00:00:00Z"),
+  "updated_at": ISODate("2023-01-01T00:00:00Z")
+}
+```
+
+## Default Roles
+1. **admin** - Full access to all system features
+2. **editor** - Can manage content and user profiles
+3. **user** - Standard user with limited access
+
+## Security Considerations
+- Passwords are never stored in plain text
+- Role-based access control is enforced at the application level
+- All timestamps are stored in UTC
+- Email addresses are case-insensitive for uniqueness but preserved as entered