If you are playing in a league, association, or club that uses TeamLinkt and has the Vaccine Tracking feature turned on, and has enabled team admins to verify their players, here's how you can update your players' vaccination status:
Log in from the web (this will not work from a phone) at app.teamlinkt.com
Go to Roster > Verify Roster in the upper right
Check off the Verified toggle for players on your team!