auth_code_pkce: add from_token_with_config() constructor

[gdesmott]

Description

Add AuthCodePkceSpotify::from_token_with_config()

Motivation and Context

This is required to be able to refresh an expired token from the cache as we need the client ID to refresh the token.

Fix #511

Dependencies

None

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How has this been tested?

• Call a AuthCodePkceSpotify using with_config() and

Config {
        token_cached: true,
        token_refreshing: true,
        ..Default::default()
    };

• Authenticate using the normal flow.
• Terminate the app and wait for one hour for the token to expired.
• Restore the token using Token::from_cache() and check that token.is_expired() returns true.
• Create a client with AuthCodePkceSpotify::from_token() and then call client.refresh_token(). The client won't work as the token has not been refresh. You can also check by calling client.refetch_token() as it returns None.
• Now create a client using AuthCodePkceSpotify::from_token_with_config() passing the proper Credentials. client.refresh_token() and client.refetch_token() are now working.

Is this change properly documented?

Yes.

[ramsayleung]

thanks for your contribution :)