refactor: [go] replace the generic to specific type when creating jwt

[fernan542]

When creating new JWT objects for payload, the classes and object type are using "generic" instead of their actual type.
Imports are moved by auto format.

[stephenmcd]

Thanks for this. The go samples are actually generated by the template in templates/template.go - it contains placeholders for things like the pass type, which should be used to achieve this fix. Did you want to try that?

[fernan542]

Hello, thanks for the explanation, I think it should be included in the main Readme file.
Also I want to request if possible to add Go at the list of supported frameworks in Web API documentation. Thanks!