feat(oauth-providers): Allow passing state in google oath middleware (#454)

* improve(#453): Allow for state to be passed to AuthFlow

* fix(#453): No need to cast as string

* chore(#453): Create changeset

Closes #453

* fix(#453): Needed to take CSRF into account

.changeset/green-files-thank.md

@@ -0,0 +1,5 @@
+---
+'@hono/oauth-providers': minor
+---
+
+Allow for an optional state arg to be passed to Google Auth middleware

packages/oauth-providers/src/providers/google/googleAuth.ts

@@ -11,9 +11,10 @@ export function googleAuth(options: {
   prompt?: 'none' | 'consent' | 'select_account'
   client_id?: string
   client_secret?: string
+  state?: string
 }): MiddlewareHandler {
   return async (c, next) => {
-    const newState = getRandomState()
+    const newState = options.state || getRandomState()
     // Create new Auth instance
     const auth = new AuthFlow({
       client_id: options.client_id || (c.env?.GOOGLE_ID as string),