# Get User by ID

**GET /api/v1/users/{id}**

Retrieve user information by user ID within a tenant context.

**Authentication**: Required (JWT Bearer token)

**Tenant Context**: Required

**Headers**:
- `Authorization: JWT {access_token}`
- `X-Tenant-ID: {tenant_id}` (required in development mode)

**URL Parameters**:

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| id | UUID | Yes | User ID |

**Example Request**:

```bash
curl -X GET http://localhost:8000/api/v1/users/950e8400-e29b-41d4-a716-446655440000 \
  -H "Authorization: JWT eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." \
  -H "X-Tenant-ID: 850e8400-e29b-41d4-a716-446655440000"
```

**Example Response** (200 OK):

```json
{
  "id": "950e8400-e29b-41d4-a716-446655440000",
  "email": "jane@techstart.com",
  "name": "Jane Smith",
  "created_at": "2024-10-24T00:00:00Z",
  "updated_at": "2024-10-24T00:00:00Z"
}
```

**Error Responses**:

This endpoint returns errors in **RFC 9457 (Problem Details for HTTP APIs)** format.

**Content-Type**: `application/problem+json`

**400 Bad Request** - Missing tenant context:
```json
{
  "type": "about:blank",
  "title": "Bad Request",
  "status": 400,
  "detail": "Tenant context required"
}
```

**401 Unauthorized**:
```json
{
  "type": "about:blank",
  "title": "Unauthorized",
  "status": 401,
  "detail": "Authentication required"
}
```

**404 Not Found**:
```json
{
  "type": "about:blank",
  "title": "Not Found",
  "status": 404,
  "detail": "User not found in this tenant"
}
```

**500 Internal Server Error**:
```json
{
  "type": "about:blank",
  "title": "Internal Server Error",
  "status": 500,
  "detail": "Failed to retrieve user"
}
```