Getting oauth token in template app

[tusharj]

Hi Folks,

I am trying to create a report with datasource being an api which needs oauth token. 

I am planning to publish this report as a template app in the appsource and that is when this app should ask for the some required parameters and ask for users org sign-in account get a token and than call the configured webapi with the token passed as header (typical auth rest api mechanism)

I want to know how can I get the oauthtoken in the report and refresh it?

Any pointers on this will be helpful.

Thanks

Tushar J