DiscordOAuth discordOAuth = new DiscordOAuth(
        "CLIENT_ID",
        "CLIENT_SECRET",
        "REDIRECT_URI",
        new String[]{
            "identify",
            "email"
        });
    String authorizationURL = discordOAuth.getAuthorizationURL();

    String code = "code"; // This is the code which is returned by the discord oauth2 api
    
    DiscordOAuth discordOAuth = new DiscordOAuth(
        "CLIENT_ID",
        "CLIENT_SECRET",
        "REDIRECT_URI",
        new String[]{
            "identify",
            "email"
        });
        
    DiscordOauthAuthorizeResponse tokens = discordOAuth.requestTokens(code);
    
    String accessToken = tokens.getAccessToken();

    DiscordAPI discordAPI = new DiscordAPI(tokens.getAccessToken());
    DiscordUser discordUser = discordAPI.fetchUser();
    String email = discordUser.getEmail();