The following examples are for some well-known OAuth2 providers. For each example, you may change at least the folling values with your own:

#define CLIENT_ID "clientXyz"
#define CLIENT_SECRET "secretXyz"
#define REDIRECT_URI "https://www.example.com/"
#define SCOPE "scope_values"

Please check each provider docmentation for how to register OAuth2 clients.

Update the source file *.c with your client parameters, then run make '*_example'.

Example:

$ make glewlwyd_oidc_id_token_code