[Server] Introduce admin stream channel

src/server/api/stream/channels/admin.ts

@@ -0,0 +1,16 @@
+import autobind from 'autobind-decorator';
+import Channel from '../channel';
+
+export default class extends Channel {
+	public readonly chName = 'admin';
+	public static shouldShare = true;
+	public static requireCredential = true;
+
+	@autobind
+	public async init(params: any) {
+		// Subscribe admin stream
+		this.subscriber.on(`adminStream:${this.user._id}`, data => {
+			this.send(data);
+		});
+	}
+}