Some fans attending two recent games in New York City helped test a new digital health pass that can show proof a person has recently tested negative for COVID-19 or been vaccinated against the virus that causes the disease. Fans at a Feb. 27 Brooklyn Nets game at the Barclays Center and at a March 2 New York Rangers game at Madison Square Garden helped test the Excelsior Pass, which was developed by the state and IBM. People using the pass can print it out or use their smartphones to display a copy when they’re entering an arena. The test results are being used to enhance the quality of the pass, officials said when recently announcing the pilot program. “As we begin reopening the valves on different sectors of our economy, we are putting guidelines in place to ensure individuals attending events involving larger gatherings have tested negative for COVID …