If you have sucessfully setup kubectl, you can receive the link to the kubernetes-dashboard by running:
kubectl cluster-info
Click on the dashboard link and you will be asked for a token to login. Run the following command to get a token:
kubectl -n kube-system describe secrets `kubectl -n kube-system get secrets | awk '/clusterrole-aggregation-controller/ {print $1}'`| awk '/token:/ {print $2}'
Choose Token on the login screen and paste the token to login.