src/vs/platform/userDataSync/common/userDataSyncStoreService.ts/UserDataSyncStoreClient/clear
class UserDataSyncStoreClient:	async clear(): Promise<void> {
		if (!this.userDataSyncStoreUrl) {
			throw new Error('No settings sync store url configured.');
		}

		await this.deleteResources();
		await this.deleteCollection();

		// clear cached session.
		this.clearSession();
	}