To create or manage roles of users, follow the below steps.
Inside your Plesk panel select Users tab.
Under the User Accounts section, select User Roles tab.
Default roles of users are predefined in Plesk. You can create new user role by clicking on the Create User Role icon.
Give a name in the General tab for the role of the user.
In the privileges tab, gives the privileges to user as required.
Click OK to complete.