feat: typescript support in auth components

Co-authored-by: Andrew Bastin <andrewbastin.k@gmail.com>

helpers/fb/auth.ts

@@ -13,6 +13,9 @@ import {
   signInWithEmailLink as signInWithEmailLinkFB,
   ActionCodeSettings,
   signOut,
+  linkWithCredential,
+  AuthCredential,
+  UserCredential,
 } from "firebase/auth"
 import {
   onSnapshot,
@@ -176,6 +179,13 @@ export async function getSignInMethodsForEmail(email: string) {
   return await fetchSignInMethodsForEmail(getAuth(), email)
 }
 
+export async function linkWithFBCredential(
+  user: User,
+  credential: AuthCredential
+) {
+  return await linkWithCredential(user, credential)
+}
+
 /**
  * Sends an email with the signin link to the user
  *
@@ -244,6 +254,10 @@ export async function setProviderInfo(id: string, token: string) {
   }
 }
 
+export function getGithubCredentialFromResult(result: UserCredential) {
+  return GithubAuthProvider.credentialFromResult(result)
+}
+
 /**
  * A Vue composable function that is called when the auth status
  * is being updated to being logged in (fired multiple times),