fix incorrect redirect url

app.py

-from flask import Flask, send_from_directory, url_for
+from flask import Flask, send_from_directory
 
 from database.db import db
 from config.config import APP_NAME, ENV, get_app_config, get_static_url

blueprints/home.py

-from flask import Blueprint, render_template, request, redirect, url_for
+from flask import Blueprint, render_template, request, redirect
+from config import url_for2
 from database.db import db
 from models.user import Entity
 
@@ -30,6 +31,9 @@ def entities():
         username = request.form.get('username')
         email = request.form.get('email')
 
-        db.session.add(Entity(username=username, email=email))
-        db.session.commit()
-        return redirect('/entities')
+        try:
+            db.session.add(Entity(username=username, email=email))
+            db.session.commit()
+            return redirect(url_for2('.entities'))
+        except:
+            return "Could not add entity, username and/or email are already in use."