diff --git a/src/github.com/matrix-org/go-neb/database/db.go b/src/github.com/matrix-org/go-neb/database/db.go
index 9ade230..de4741d 100644
--- a/src/github.com/matrix-org/go-neb/database/db.go
+++ b/src/github.com/matrix-org/go-neb/database/db.go
@@ -218,9 +218,10 @@ func (d *ServiceDB) StoreAuthSession(session types.AuthSession) (old types.AuthS
 	return
 }
 
-// LoadAuthSession loads an AuthSession from the database.
+// LoadAuthSessionForUser loads an AuthSession from the database based on the given
+// realm and user ID.
 // Returns sql.ErrNoRows if the session isn't in the database.
-func (d *ServiceDB) LoadAuthSession(realmID, userID string) (session types.AuthSession, err error) {
+func (d *ServiceDB) LoadAuthSessionForUser(realmID, userID string) (session types.AuthSession, err error) {
 	err = runTransaction(d.db, func(txn *sql.Tx) error {
 		session, err = selectAuthSessionTxn(txn, realmID, userID)
 		return err
diff --git a/src/github.com/matrix-org/go-neb/realms/github/github.go b/src/github.com/matrix-org/go-neb/realms/github/github.go
index aaf7a67..b763768 100644
--- a/src/github.com/matrix-org/go-neb/realms/github/github.go
+++ b/src/github.com/matrix-org/go-neb/realms/github/github.go
@@ -71,6 +71,17 @@ func (r *githubRealm) RequestAuthSession(userID string, req json.RawMessage) int
 }
 
 func (r *githubRealm) OnReceiveRedirect(w http.ResponseWriter, req *http.Request) {
+	code := req.URL.Query().Get("code")
+	state := req.URL.Query().Get("state")
+	log.WithFields(log.Fields{
+		"code":  code,
+		"state": state,
+	}).Print("GithubRealm: OnReceiveRedirect")
+	if code == "" || state == "" {
+		w.WriteHeader(400)
+		w.Write([]byte("code and state are required"))
+		return
+	}
 }
 
 func (r *githubRealm) AuthSession(userID, realmID string) types.AuthSession {