src/vs/platform/credentials/common/credentials.ts/InMemoryCredentialsProvider/deletePassword
class InMemoryCredentialsProvider:	async deletePassword(service: string, account: string): Promise<boolean> {
		if (!this.secretVault[service]?.[account]) {
			return false;
		}
		delete this.secretVault[service]![account];
		if (Object.keys(this.secretVault[service]!).length === 0) {
			delete this.secretVault[service];
		}
		return true;
	}