[MOL-13183] fetch userinfo from NDI

[ryhuz]

add methods for fetching userinfo from NDI using /userinfo

[rgchua]

this should be the other way round? deprecated fn is constructAuthorizationUrl.

so i think we should make the params of the old function work with the new one -

• the old one doesn't even need to support new functionality (like scopes)
• we only ever update the new function (if we do this now when we remove the deprecation we gotta move the code over to V2)
• if a consumer wants to use /userinfo and by extension scopes , they gotta use constructAuthorizationUrlV2.

` public constructAuthorizationUrl = async (
state: string,
nonce?: string,
codeVerifier?: string,
): Promise => {

	return this.constructAuthorizationUrlV2({
		state,
		nonce,
		codeVerifier,
		userInfoScope: ["openid"]
	});
};

public constructAuthorizationUrlV2 = async (params: {
	state: string;
	userInfoScope: string[];
	nonce?: string;
	codeVerifier?: string;
}) => {

	const { state, nonce, userInfoScope, codeVerifier } = params;
	const { authorization_endpoint } = await this.getOidcConfig();
	userInfoScope.unshift("openid"); // is this needed at all if we do this?

	const queryParams = {
		state,
		...(nonce ? { nonce } : {}),
		redirect_uri: this.redirectUri,
		scope: userInfoScope.join(" "),
		client_id: this.clientID,
		response_type: "code",
		...(codeVerifier
			? { code_challenge_method: "S256", code_challenge: generators.codeChallenge(codeVerifier) }
			: {}),
	};
	const queryString = querystringUtil.stringify(queryParams);
	return `${authorization_endpoint}?${queryString}`;
};

`

[rgchua]