[REQ][TypescriptAxios] want to use promise in apiKey when using Authenticate Server

Created by: tanmen

When I used cognito(authenticate server), I found it difficult to use typescript-client.

Now

getApiToken().then(token => new PetApi(new Configuration({apiKey: token}))).then(api => api.getPets());

I hope to be

new PetApi(new Configuration({apiKey: getApiToken})).getPets();

Is your feature request related to a problem? Please describe.

N/A

Describe the solution you'd like

I want a Promise Type for apiKey.

Describe alternatives you've considered

#5953

Additional context

N/A