Added a global mutex (not used yet) and moved around the code for loggin in since I suspect the Get Roles call is using deffered execution on the database causing the lock when attempting to access straight away #2750

src/Ombi.Helpers/GlobalMutex.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Threading;
+
+namespace Ombi.Helpers
+{
+    public static class GlobalMutex
+    {
+        public static T Lock<T>(Func<T> func)
+        {
+            const string mutexId = "Global\\OMBI";
+
+            using (var mutex = new Mutex(false, mutexId, out __))
+            {
+                var hasHandle = false;
+                try
+                {
+                    try
+                    {
+                        hasHandle = mutex.WaitOne(5000, false);
+                        if (hasHandle == false)
+                            throw new TimeoutException("Timeout waiting for exclusive access");
+                    }
+                    catch (AbandonedMutexException)
+                    {
+                        hasHandle = true;
+                    }
+
+                    return func();
+                }
+                finally
+                {
+                    if (hasHandle)
+                        mutex.ReleaseMutex();
+                }
+            }
+        }
+    }
+}