ServiceClientCredentials interface  
Represents an object or class with a signRequest method which will sign outgoing requests (for example, by setting the Authorization header).
Methods
| sign | Signs a request with the Authentication header. | 
Method Details
		signRequest(WebResourceLike)
	   
	Signs a request with the Authentication header.
function signRequest(webResource: WebResourceLike): Promise<WebResourceLike>Parameters
- webResource
- WebResourceLike
The WebResourceLike/request to be signed.
Returns
Promise<WebResourceLike>
The signed request object;