Click on Settings>> Users & Teams >> Teams - to create a team and then assign to a member.
Now, you will be able to add a team member by clicking on the option - Settings >> Users & Teams >> Add Teams Members
To access your team members, head to the Settings, click on the Users & Teams option and then click on Add Teams Members.
First Name and Last Name
Select the team on which you need to add the team members to.
Select the role of the Member.
Click on ADD.
Here is the place where you can select the Team, Marked in red.