src/vs/platform/userDataSync/common/userDataSyncMachines.ts/UserDataSyncMachinesService/addCurrentMachine
class UserDataSyncMachinesService:	async addCurrentMachine(manifest?: IUserDataManifest): Promise<void> {
		const currentMachineId = await this.currentMachineIdPromise;
		const machineData = await this.readMachinesData(manifest);
		if (!machineData.machines.some(({ id }) => id === currentMachineId)) {
			machineData.machines.push({ id: currentMachineId, name: this.computeCurrentMachineName(machineData.machines), platform: getPlatformName() });
			await this.writeMachinesData(machineData);
		}
	}