src/vs/workbench/services/credentials/browser/credentialsService.ts/InMemoryCredentialsProvider/deletePassword
class InMemoryCredentialsProvider:	async deletePassword(service: string, account: string): Promise<boolean> {
		const credential = this.doFindPassword(service, account);
		if (credential) {
			this.credentials = this.credentials.splice(this.credentials.indexOf(credential), 1);
		}

		return !!credential;
	}