Anyone with login credentials to LaborChart is a User.
To see your Users, navigate to the Group you want to search and go to the People Page. Once you are on the People Page, apply the filter labeled Person Type = User.
This will display the people in your account who are Users and have login credentials to your LaborChart account.
People with access to your LaborChart account will have a silhouette icon beside their name (see below image).
The silhouette icon indicates that the person can login to LaborChart. Their level of access will be determined by their permission. To quickly see your User's Permission level, go to the column selector and add Permission as an active column.
Below is an example of Users in an account, including Permission Level.