extensions/microsoft-authentication/src/AADHelper.ts/AzureActiveDirectoryService/clearSessions
class AzureActiveDirectoryService:	public async clearSessions() {
		Logger.info('Logging out of all sessions');
		this._tokens = [];
		await this._tokenStorage.deleteAll();

		this._refreshTimeouts.forEach(timeout => {
			clearTimeout(timeout);
		});

		this._refreshTimeouts.clear();
	}