method TLSSocket.prototype.getCertificate
Usage in Deno
```typescript import { TLSSocket } from "node:node__tls.d.ts"; ```
TLSSocket.prototype.getCertificate():
Returns an object representing the local certificate. The returned object has
some properties corresponding to the fields of the certificate.
See TLSSocket.getPeerCertificate for an example of the certificate
structure.
If there is no local certificate, an empty object will be returned. If the
socket has been destroyed, `null` will be returned.