Support for Oauth Audiences

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

For security purposes, Oauth servers require an audience to be provided so that a JWT token can be issued.
If the audience is not provided the server won't issue a standard JWT token.

**Describe the solution you'd like**
Allow developers to specify the audience in the configuration file and forward the audience while redirecting to the user to oauth provider server.

**Describe alternatives you've considered**
There are no alternatives. I've validated that this works by intercepting the redirect and injecting the audience parameter.

**Additional context**
Without the audience its not possible to integrated with services like Auth0.
https://auth0.com/docs/get-started/authentication-and-authorization-flow/authorization-code-flow/call-your-api-using-the-authorization-code-flow#authorize-user

Example from the Auth0 documentation:
```

Sign In

```

Start by locating the OAuth configuration and the code that constructs the redirect to the provider. Trace how configured authorization parameters are forwarded, then verify that a configured audience appears in the redirect and supports the Auth0 authorization-code example described in the issue.

Written by the indexing model from the issue text.