public static function migrate_connection() {
		// Don't attempt to migrate if attempted before.
		if ( WC_Helper_Options::get( 'did-migrate' ) ) {
			return;
		}

		$auth = WC_Helper_Options::get( 'auth' );
		if ( ! empty( $auth ) ) {
			return;
		}

		WC_Helper::log( 'Attempting oauth/migrate' );
		WC_Helper_Options::update( 'did-migrate', true );

		$master_key = get_option( 'woothemes_helper_master_key' );
		if ( empty( $master_key ) ) {
			WC_Helper::log( 'Master key not found, aborting' );
			return;
		}

		$request = WC_Helper_API::post(
			'oauth/migrate',
			array(
				'body' => array(
					'home_url'   => home_url(),
					'master_key' => $master_key,
				),
			)
		);

		if ( is_wp_error( $request ) || wp_remote_retrieve_response_code( $request ) !== 200 ) {
			WC_Helper::log( 'Call to oauth/migrate returned a non-200 response code' );
			return;
		}

		$request_token = json_decode( wp_remote_retrieve_body( $request ) );
		if ( empty( $request_token ) ) {
			WC_Helper::log( 'Call to oauth/migrate returned an empty token' );
			return;
		}

		// Obtain an access token.
		$request = WC_Helper_API::post(
			'oauth/access_token',
			array(
				'body' => array(
					'request_token' => $request_token,
					'home_url'      => home_url(),
					'migrate'       => true,
				),
			)
		);

		if ( is_wp_error( $request ) || wp_remote_retrieve_response_code( $request ) !== 200 ) {
			WC_Helper::log( 'Call to oauth/access_token returned a non-200 response code' );
			return;
		}

		$access_token = json_decode( wp_remote_retrieve_body( $request ), true );
		if ( empty( $access_token ) ) {
			WC_Helper::log( 'Call to oauth/access_token returned an invalid token' );
			return;
		}

		WC_Helper_Options::update(
			'auth',
			array(
				'access_token'        => $access_token['access_token'],
				'access_token_secret' => $access_token['access_token_secret'],
				'site_id'             => $access_token['site_id'],
				'user_id'             => null, // Set this later
				'updated'             => time(),
			)
		);

		// Obtain the connected user info.
		if ( ! WC_Helper::_flush_authentication_cache() ) {
			WC_Helper::log( 'Could not obtain connected user info in migrate_connection' );
			WC_Helper_Options::update( 'auth', array() );
			return;
		}
	}