intigrate access token management into auto generated swagger client

I am trying to generate my custom client using swagger definition and my own generator with some extra feature to token management and refresh token. Can I do that?
We are using different gateway to connect to the rest services. There is a token management part for that gateway. So we need to integrate that token management security part into our automatically generated client. Please tell me how to do that. We are stuck at this. Please help me.