Runner-coach-admin role distinction

With this update, coaches will be able to create an additional runner account, and runners an additional coach account. When logging in, customers with different accounts will have the possibility to view KULG as a runner or as a coach.

We will also create an admin role, which will give coaches a possibility to assign other coaches as admins to send out training plans to runners who have not given them direct access to their data. Admin account will only be able to share plans but will not have access to runners’ data.