Want a user to access only his index

I am monitoring customers networks, I want to be able to provide them with access to kibana, in kibana I want them to be able to access the index which I have created for them(each customer has his own index and should only be able to see it) and should also be able to make reports. I have been trying to achieve this but no success yet, I see all indexes when I login with a customers username and password. Hope this clarifies.