# API Reference
## Constructs
### AlarmInstance
#### Initializers
```typescript
import { AlarmInstance } from 'cdk-demo-construct'
new AlarmInstance(scope: Construct, id: string, props: AlarmInstanceProps)
```
##### `scope`Required
- *Type:* [`@aws-cdk/core.Construct`](#@aws-cdk/core.Construct)
---
##### `id`Required
- *Type:* `string`
---
##### `props`Required
- *Type:* [`cdk-demo-construct.AlarmInstanceProps`](#cdk-demo-construct.AlarmInstanceProps)
---
#### Properties
##### `instance`Required
```typescript
public readonly instance: Instance;
```
- *Type:* [`@aws-cdk/aws-ec2.Instance`](#@aws-cdk/aws-ec2.Instance)
---
##### `topic`Required
```typescript
public readonly topic: Topic;
```
- *Type:* [`@aws-cdk/aws-sns.Topic`](#@aws-cdk/aws-sns.Topic)
---
## Structs
### AlarmInstanceProps
#### Initializer
```typescript
import { AlarmInstanceProps } from 'cdk-demo-construct'
const alarmInstanceProps: AlarmInstanceProps = { ... }
```
##### `vpc`Required
```typescript
public readonly vpc: IVpc;
```
- *Type:* [`@aws-cdk/aws-ec2.IVpc`](#@aws-cdk/aws-ec2.IVpc)
---
##### `notifyMail`Optional
```typescript
public readonly notifyMail: string[];
```
- *Type:* `string`[]
---
##### `topic`Optional
```typescript
public readonly topic: Topic;
```
- *Type:* [`@aws-cdk/aws-sns.Topic`](#@aws-cdk/aws-sns.Topic)
---
##### `userData`Optional
```typescript
public readonly userData: UserData;
```
- *Type:* [`@aws-cdk/aws-ec2.UserData`](#@aws-cdk/aws-ec2.UserData)
---