Avoid models, services and those kind of name for packages.

[j6sbits]

In concordance to https://google.github.io/styleguide/go/decisions#package-names package names should:

Avoid uninformative package names like 
util, utility, common, helper, models, and
 so on that would tempt users of the 
package to [rename it when importing]
(https://google.github.io/styleguide/go/decisions#import-renaming)