Simplification of structure

[Rostislav Litovkin]

Instead of typing:

const client = getClient("bsx")
const query = client.collectionListByIssuer('vikiival')

and keeping track of the client, or reinitializing it all over and over again, it could be better to just have one static client, that would be used like this:

const query = bsx.collectionListByIssuer('vikiival')