diff --git a/Reactor.Greenhouse/Program.cs b/Reactor.Greenhouse/Program.cs
index 744d047..9c2f625 100644
--- a/Reactor.Greenhouse/Program.cs
+++ b/Reactor.Greenhouse/Program.cs
@@ -11,6 +11,7 @@ using Mono.Cecil;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using Reactor.Greenhouse.Setup;
+using Reactor.Greenhouse.Setup.Provider;
 using Reactor.OxygenFilter;
 
 namespace Reactor.Greenhouse
@@ -30,10 +31,20 @@ namespace Reactor.Greenhouse
             return rootCommand.InvokeAsync(args);
         }
 
-        public static async Task GenerateAsync(bool steam, bool itch)
+        public static async Task<int> GenerateAsync(bool steam, bool itch)
         {
             var gameManager = new GameManager();
-            await gameManager.SetupAsync(steam, itch);
+
+            try
+            {
+                await gameManager.SetupAsync(steam, itch);
+            }
+            catch (ProviderConnectionException e)
+            {
+                Console.WriteLine($"Error downloading version : {e.Message}");
+                return 1;
+            }
+
 
             JsonConvert.DefaultSettings = () => new JsonSerializerSettings
             {
@@ -55,6 +66,8 @@ namespace Reactor.Greenhouse
             {
                 await GenerateAsync(gameManager.Itch, old);
             }
+
+            return 0;
         }
 
         private static async Task GenerateAsync(Game game, ModuleDefinition old)
diff --git a/Reactor.Greenhouse/Setup/Provider/BaseProvider.cs b/Reactor.Greenhouse/Setup/Provider/BaseProvider.cs
index b552ab7..296ea93 100644
--- a/Reactor.Greenhouse/Setup/Provider/BaseProvider.cs
+++ b/Reactor.Greenhouse/Setup/Provider/BaseProvider.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Threading.Tasks;
 
 namespace Reactor.Greenhouse.Setup.Provider
@@ -10,4 +11,11 @@ namespace Reactor.Greenhouse.Setup.Provider
         public abstract Task DownloadAsync();
         public abstract bool IsUpdateNeeded();
     }
-}
+
+    public abstract class ProviderConnectionException : Exception
+    {
+        protected ProviderConnectionException(string message) : base(message)
+        {
+        }
+    }
+}
\ No newline at end of file
diff --git a/Reactor.Greenhouse/Setup/Provider/SteamProvider.cs b/Reactor.Greenhouse/Setup/Provider/SteamProvider.cs
index 543e323..76de562 100644
--- a/Reactor.Greenhouse/Setup/Provider/SteamProvider.cs
+++ b/Reactor.Greenhouse/Setup/Provider/SteamProvider.cs
@@ -67,7 +67,15 @@ namespace Reactor.Greenhouse.Setup.Provider
             if (environmentVariable != null)
             {
                 var split = environmentVariable.Split(":");
-                ContentDownloader.InitializeSteam3(split[0], split[1]);
+                if(!ContentDownloader.InitializeSteam3(split[0], split[1]))
+                {
+                    throw new SteamProviderConnectionException("Wrong password");
+                }
+
+                if (ContentDownloader.steam3 == null || !ContentDownloader.steam3.bConnected)
+                {
+                    throw new SteamProviderConnectionException("Unable to initialize Steam");
+                }
             }
             else
             {
@@ -85,7 +93,11 @@ namespace Reactor.Greenhouse.Setup.Provider
                     Console.WriteLine();
                 }
 
-                ContentDownloader.InitializeSteam3(username, password);
+                if (!ContentDownloader.InitializeSteam3(username, password))
+                {
+                    throw new SteamProviderConnectionException("Unable to initialize Steam");
+                }
+
             }
 
             ContentDownloader.Config.UsingFileList = true;
@@ -106,4 +118,12 @@ namespace Reactor.Greenhouse.Setup.Provider
             return ContentDownloader.DownloadAppAsync(AppId, DepotId, IsPreObfuscation ? PreObfuscationManifest : ContentDownloader.INVALID_MANIFEST_ID);
         }
     }
+
+    public class SteamProviderConnectionException : ProviderConnectionException
+    {
+        public SteamProviderConnectionException(string message) : base(message)
+        {
+           
+        }
+    }
 }