src/vs/workbench/api/browser/mainThreadSecretState.ts/MainThreadSecretState/$setPassword
class MainThreadSecretState:	async $setPassword(extensionId: string, key: string, value: string): Promise<void> {
		const fullKey = await this.getFullKey(extensionId);
		const toEncrypt = JSON.stringify({
			extensionId,
			content: value
		});
		const encrypted = await this.encryptionService.encrypt(toEncrypt);
		return this.credentialsService.setPassword(fullKey, key, encrypted);
	}