FIX: Use safe navigation operator when looking for avatar URL

lib/auth/managed_authenticator.rb

@@ -94,7 +94,7 @@ class Auth::ManagedAuthenticator < Auth::Authenticator
   def after_create_account(user, auth)
     data = auth[:extra_data]
     create_association!(data.merge(user: user))
-    retrieve_avatar(user, data["info"]["image"])
+    retrieve_avatar(user, data&.[]("info")&.[]("image"))
   end
 
   def retrieve_avatar(user, url)