Web:
Click Teams and Users
Select Team to add new members
Click 3 dots (⋮) to right of Team name
Click Add Members
Select member(s) to add
Click Add Member at bottom of screen
Adding New Member to Team
Web:
Click Teams and Users
Select Team to add new members
Click 3 dots (⋮) to right of Team name
Click Add Members
Select member(s) to add
Click Add Member at bottom of screen