Which is the best way to provide OAuth to my module in order to call some external APIs?

[francesca]

I have developed my own module and I need it to make POST and GET request to an external API, under OAuth protocol.

Which one of the following is the best option?

-do all the authorization process during the installation (how ??) and save the access token (on the DB ??)

-create a backoffice page where I ask the website-manager to authorize the plugin to make external calls (but then until he doesn't do that the plugin doesn't make its job)

- something else ?....

 

Is there some simple plugin I can take as an example?