If you have Admin-level access, you can grant other crew members access to your Vessel Dashboard.
To grant admin access to your Vessel Dashboard:
Open the settings menu via the cog icon ⚙️ at the top right of the Vessel Dashboard
Select Users
Click on the name of the crew member you wish to grant access
Open the Permission drop-down
Select a permission level (find out what the permission levels let you do)
This will automatically trigger an email to be sent to that crew member which will include the link to the Vessel Dashboard, so no worries about sending them the link separately.