Function Throttle

Throttle<T extends Function = Function>(
rateLimit: RateLimitInput,
): MethodDecorator
Declare what a handler method is throttled by.

The form that needs no router: a single-handler application, a command, a queue consumer. When a router is in play, declaring it on the route is usually better, because the route is then the single description of itself and a group can compose its own budget on top.
Type Parameters
- T extends Function = Function
Parameters
- rateLimit: RateLimitInput
  One rule, or several that all apply.
Returns MethodDecorator
A method decorator.
Example
```
class AuthController {
  @Throttle({ max: 3, window: 900, by: 'email' })
  sendCode (event: IncomingHttpEvent) { … }
}
```