Email-like field in /api/v1/accounts/verify_credentials response (for OAuth plugins like Peertube).

Addresses https://git.pleroma.social/pleroma/pleroma-support/-/issues/56.

lib/pleroma/web/router.ex

@@ -319,6 +319,8 @@ defmodule Pleroma.Web.Router do
   end
 
   scope "/oauth", Pleroma.Web.OAuth do
+    # Note: use /api/v1/accounts/verify_credentials for userinfo of signed-in user
+
     get("/registration_details", OAuthController, :registration_details)
 
     post("/mfa/verify", MFAController, :verify, as: :mfa_verify)