108536490: Fix bug when user does not exist and tries to sign in

app/main/views/sign_in.py

@@ -20,12 +20,12 @@ def process_sign_in():
     form = LoginForm()
     if form.validate_on_submit():
         user = users_dao.get_user_by_email(form.email_address.data)
+        if user is None:
+            return jsonify(authorization=False), 401
         if user.is_locked():
             return jsonify(locked_out=True), 401
         if not user.is_active():
             return jsonify(active_user=False), 401
-        if user is None:
-            return jsonify(authorization=False), 401
         if checkpw(form.password.data, user.password):
             login_user(user)
         else: