feat(providers): add authentik provider (#3625)

* Added authentik provider

* Removed idToken

src/providers/authentik.ts

@@ -0,0 +1,44 @@
+import type { OAuthConfig, OAuthUserConfig } from "."
+
+export interface AuthentikProfile {
+  iss: string,
+  sub: string,
+  aud: string,
+  exp: number,
+  iat: number,
+  auth_time: number,
+  acr: string,
+  c_hash: string,
+  nonce: string,
+  at_hash: string,
+  email: string,
+  email_verified: boolean,
+  name: string,
+  given_name: string,
+  family_name: string,
+  preferred_username: string,
+  nickname: string,
+  groups: string[]
+}
+
+export default function Authentik<
+  P extends Record<string, any> = AuthentikProfile
+>(options: OAuthUserConfig<P>): OAuthConfig<P> {
+  return {
+    id: "authentik",
+    name: "Authentik",
+    wellKnown: `${options.issuer}/.well-known/openid-configuration`,
+    type: "oauth",
+    authorization: { params: { scope: "openid email profile" } },
+    checks: ["pkce", "state"],
+    profile(profile) {
+      return {
+        id: profile.sub,
+        name: profile.name ?? profile.preferred_username,
+        email: profile.email,
+        image: profile.picture,
+      }
+    },
+    options,
+  }
+}