Feature Request: Access Token

[spechtx]

Hi there,

it's a great library! Thank you for making it available.

It would be helpful, if the library would accept access tokens for tile servers like:
https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=pk.******
https://api.maptiler.com/maps/{z}/{x}/{y}.png?key=*****

[capoaira]

You can simply write your token in the template