doctor model and doctors-patients association created now to test the CRUD actions for the doctor then email invite and the association between doctors - patients, then permissions creation
doctors valid instatiation and association - :new controller spec success
doctors - :show controller specs
doctors - :edit controller specs
doctors - :create controller specs
doctors - :update controller specs and feature spec
doctors - :delete controller specs and feature spec
resolved typo not to authenticate doctors and move onto Permission based model