You can change the roles of your registered users or add multiple ones if needed in settings.
You can give users multiple roles, change roles and remove roles.
Navigate to Settings > Connections
Find the user you want to change the role of
Click the 3 dots on the right side of the screen
Click "Manage roles" on the drop-down menu
Select the desired role in the pop-up (and unselect the redundant role)
Click "Update"
NB! Users can have multiple roles at the same time!