How to add new course taker?

1. Go to Teams
2. On the upper right corner, select the course you want to add the course taker.
3. You choose  Add a new Person to this team
   
4. Fill out the information needed (Name and E-mail address)
   
5. Remember to use the e-mail address as username too. 
6. Finish with Add Person or Add Person then Add another (If you will add more than one person)