extensions/microsoft-authentication/src/betterSecretStorage.ts/BetterTokenStorage/updateKeyList
class BetterTokenStorage:	private async updateKeyList(tokens: Map<string, T>) {
		const keyList = [];
		for (const [key] of tokens) {
			keyList.push(key);
		}

		const keyListStr = JSON.stringify(keyList);
		await this._secretStorage.store(this.keylistKey, keyListStr);
	}