bug: fix mapping of multiple globus accounts.

Author: JoshuaSBrown

web/datafed-ws.js

@@ -592,12 +592,19 @@ the registration page.
 
                                     a_resp.redirect("/ui/register");
                                 } else {
+				    if ( reply.user.length > 1 ) {
+				        logger.warn("ui/authn", getCurrentLineNumber(), "More than one user was returned from DataFed, this can happen if a user has registered two or more separate accounts with DataFed and has since linked their identities from a third party identity manager. DataFed will select the first identity when logging in.");
+
+			            }
+				    let username = reply.user[0]?.uid?.replace(/^u\//, '');
                                     logger.info(
                                         "/ui/authn",
                                         getCurrentLineNumber(),
                                         "User: " +
                                             uid +
-                                            " verified, acc:" +
+                                            " verified, mapped to: " +
+                                            username +
+					    " acc:" +
                                             xfr_token.access_token +
                                             ", ref: " +
                                             xfr_token.refresh_token +
@@ -606,7 +613,7 @@ the registration page.
                                     );
 
                                     // Store only data needed for active session
-                                    a_req.session.uid = uid;
+                                    a_req.session.uid = username;
                                     a_req.session.reg = true;
 
                                     let redirect_path = "/ui/main";