Sync my account with SyncAdapter

Do you know how to sync my account from my app from accountManager with syncadapter?

I have performed the syncadapter service:

public class SyncAdapterService extends Service {

private static SyncAdapter sSyncAdapter = null;
private static final Object sSyncAdapterLock = new Object();

@Override
public void onCreate() {
    Log.d("SYNC","ONCREATE");
    synchronized (sSyncAdapterLock) {
        if (sSyncAdapter == null) {
            sSyncAdapter = new SyncAdapter(getApplicationContext(), true);
        }
    }
}

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return sSyncAdapter.getSyncAdapterBinder();
}

public void onDestroy() {
    super.onDestroy();
    Log.d("SYNC", "ONDESTROY");
}
}

The xml:

<?xml version="1.0" encoding="utf-8"?>
<sync-adapter xmlns:android="http://schemas.android.com/apk/res/android"
android:contentAuthority="@string/content_authority"
android:accountType="@string/auth_type"
android:userVisible="true"
android:allowParallelSyncs="true"
android:isAlwaysSyncable="true"
android:supportsUploading="false"/>

I added the service in the manifest.xml:

        <service
        android:name=".SyncAdapterService"
        android:exported="true">
        <intent-filter>
            <action android:name="android.content.SyncAdapter" />
        </intent-filter>

        <meta-data
            android:name="android.content.SyncAdapter"
            android:resource="@xml/sync_adapter" />
    </service>

And the class that will execute the syncadapter methods:

public class SyncAdapter extends AbstractThreadedSyncAdapter{

private Context mContext;
private static final String PREF_ACCOUNT = "accounts";

public SyncAdapter(Context context, boolean autoInitialize) {
    super(context, autoInitialize);
}

@Override
public void onPerformSync(Account account, Bundle extras, String authority, ContentProviderClient provider, SyncResult syncResult) {
    String accounts = PreferenceManager.getDefaultSharedPreferences(mContext).getString(PREF_ACCOUNT,"");
    if(!accounts.equals(account.name)){
        ContentResolver.setIsSyncable(account, authority, 0);
        return;
    }

}
}

The problem I have is that I'm lost with this method, to tell him to synchronize me with the account that I add from the accountManager.