src/vs/platform/userDataSync/common/userDataSyncIpc.ts/UserDataSyncAccountServiceChannel/listen
class UserDataSyncAccountServiceChannel:	listen(_: unknown, event: string): Event<any> {
		switch (event) {
			case 'onDidChangeAccount': return this.service.onDidChangeAccount;
			case 'onTokenFailed': return this.service.onTokenFailed;
		}
		throw new Error(`Event not found: ${event}`);
	}