auth: Make OAuth2User.generateAuthURL async

Author: dwardu

README.md

@@ -136,7 +136,7 @@ const client = new Client(authClient);
 ### Generating an Authentication URL
 
 ```typescript
-const authUrl = authClient.generateAuthURL({
+const authUrl = await authClient.generateAuthURL({
   code_challenge_method: "s256",
 });
 ```

examples/oauth2-callback.ts

@@ -32,7 +32,7 @@ app.get("/callback", async function (req, res) {
 });
 
 app.get("/login", async function (req, res) {
-  const authUrl = authClient.generateAuthURL({
+  const authUrl = await authClient.generateAuthURL({
     state: STATE,
     code_challenge_method: "s256",
   });

examples/oauth2-callback_pkce_plain.ts

@@ -32,7 +32,7 @@ app.get("/callback", async function (req, res) {
 });
 
 app.get("/login", async function (req, res) {
-  const authUrl = authClient.generateAuthURL({
+  const authUrl = await authClient.generateAuthURL({
     state: STATE,
     code_challenge_method: "plain",
     code_challenge: "test",

examples/oauth2-callback_pkce_s256.ts

@@ -32,7 +32,7 @@ app.get("/callback", async function (req, res) {
 });
 
 app.get("/login", async function (req, res) {
-  const authUrl = authClient.generateAuthURL({
+  const authUrl = await authClient.generateAuthURL({
     state: STATE,
     code_challenge_method: "s256",
   });

examples/oauth2-public-callback_pkce_s256.ts

@@ -31,7 +31,7 @@ app.get("/callback", async function (req, res) {
 });
 
 app.get("/login", async function (req, res) {
-  const authUrl = authClient.generateAuthURL({
+  const authUrl = await authClient.generateAuthURL({
     state: STATE,
     code_challenge_method: "s256",
   });

src/OAuth2User.ts

@@ -242,7 +242,7 @@ export class OAuth2User implements AuthClient {
     });
   }
 
-  generateAuthURL(options: GenerateAuthUrlOptions): string {
+  async generateAuthURL(options: GenerateAuthUrlOptions): Promise<string> {
     const { client_id, callback, scopes } = this.#options;
     if (!callback) throw new Error("callback required");
     if (!scopes) throw new Error("scopes required");