protected function loadPage()
 {
     $table = new PhabricatorAuthProviderConfig();
     $conn_r = $table->establishConnection('r');
     $data = queryfx_all($conn_r, 'SELECT * FROM %T %Q %Q %Q', $table->getTableName(), $this->buildWhereClause($conn_r), $this->buildOrderClause($conn_r), $this->buildLimitClause($conn_r));
     return $table->loadAllFromArray($data);
 }
<?php

$map = array('PhabricatorAuthProviderOAuthAmazon' => 'PhabricatorAmazonAuthProvider', 'PhabricatorAuthProviderOAuthAsana' => 'PhabricatorAsanaAuthProvider', 'PhabricatorAuthProviderOAuth1Bitbucket' => 'PhabricatorBitbucketAuthProvider', 'PhabricatorAuthProviderOAuthDisqus' => 'PhabricatorDisqusAuthProvider', 'PhabricatorAuthProviderOAuthFacebook' => 'PhabricatorFacebookAuthProvider', 'PhabricatorAuthProviderOAuthGitHub' => 'PhabricatorGitHubAuthProvider', 'PhabricatorAuthProviderOAuthGoogle' => 'PhabricatorGoogleAuthProvider', 'PhabricatorAuthProviderOAuth1JIRA' => 'PhabricatorJIRAAuthProvider', 'PhabricatorAuthProviderLDAP' => 'PhabricatorLDAPAuthProvider', 'PhabricatorAuthProviderPassword' => 'PhabricatorPasswordAuthProvider', 'PhabricatorAuthProviderPersona' => 'PhabricatorPersonaAuthProvider', 'PhabricatorAuthProviderOAuthTwitch' => 'PhabricatorTwitchAuthProvider', 'PhabricatorAuthProviderOAuth1Twitter' => 'PhabricatorTwitterAuthProvider', 'PhabricatorAuthProviderOAuthWordPress' => 'PhabricatorWordPressAuthProvider');
echo "Migrating auth providers...\n";
$table = new PhabricatorAuthProviderConfig();
$conn_w = $table->establishConnection('w');
foreach (new LiskMigrationIterator($table) as $provider) {
    $provider_class = $provider->getProviderClass();
    queryfx($conn_w, 'UPDATE %T SET providerClass = %s WHERE id = %d', $provider->getTableName(), idx($map, $provider_class, $provider_class), $provider->getID());
}