Feat check account existence

Handle and display account creation error if relevant

app/__init__.py

@@ -6,6 +6,7 @@ from __future__ import print_function
 import os
 import sys
 import subprocess
+import time
 
 # third-party imports
 from flask import Flask, redirect, url_for, request
@@ -56,6 +57,17 @@ def create_app(config_name):
         tempString = 'ssh ohpc "sudo /opt/ohpc_user_create/user_create ' + username + ' \'' + fullname + '\'"'
         print(tempString, file=sys.stdout)
 
+        tempString_run = subprocess.call(tempString)
+
+        if tempString_run == 0:
+            return redirect(return_url, 302)
+
+        else:
+            user = request.remote_user
+            render_template('errors/failed_registration.html')
+            time.sleep(6)
+            return redirect(url_for('SignUp', user=user))
+
         output = subprocess.check_output([tempString], shell=True)
 
         print(output.split('\n'), file=sys.stdout)