src/vs/platform/credentials/common/credentialsMainService.ts/BaseCredentialsMainService/clear
class BaseCredentialsMainService:	public clear(): Promise<void> {
		if (this._keytarCache instanceof InMemoryCredentialsProvider) {
			return this._keytarCache.clear();
		}

		// We don't know how to properly clear Keytar because we don't know
		// what services have stored credentials. For reference, a "service" is an extension.
		// TODO: should we clear credentials for the built-in auth extensions?
		return Promise.resolve();
	}