Missing exported function BuildAuthURLWithRedirect about gosaml2 HOT 1 OPEN

Azure (Microsoft Entra ID) also needs this if "Verification certificates" is active: "AADSTS76022: Cannot verify the signature of received authentication request since there is no certificate for verification configured in the application."

This issue says that the equivalent of BuildAuthURL is missing:

buildAuthURLWithRedirect := func(sp *saml.SAMLServiceProvider, relayState string) (string, error) {
  doc, err := sp.BuildAuthRequestDocument()
  if err != nil {
    return "", err
  }
  return sp.BuildAuthURLRedirect(relayState, doc)
}

Because of using BindingHttpRedirect instead of BindingHttpPost, this function call will add SigAlg= and Signature= query parameters next to SAMLRequest=.
(Personally, I would have them added all the time).

from gosaml2.