Fix missing authenticated URI for charge

BTCPayServer/BTCPayServer.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp2.1</TargetFramework>
-		<Version>1.0.3.74</Version>
+		<Version>1.0.3.76</Version>
     <NoWarn>NU1701,CA1816,CA1308,CA1810,CA2208</NoWarn>
   </PropertyGroup>
   <PropertyGroup>

BTCPayServer/Configuration/ExternalConnectionString.cs

@@ -94,7 +94,10 @@ namespace BTCPayServer.Configuration
                         {
                             connectionString.AccessKey = cookie[2];
                         }
-                        throw new FormatException("Invalid cookiefile format");
+                        else
+                        {
+                            throw new FormatException("Invalid cookiefile format");
+                        }
                     }
                     else if (serviceType == ExternalServiceTypes.Charge)
                     {

BTCPayServer/Controllers/ServerController.cs

@@ -524,6 +524,10 @@ namespace BTCPayServer.Controllers
             ChargeServiceViewModel vm = new ChargeServiceViewModel();
             vm.Uri = connectionString.Server.AbsoluteUri;
             vm.APIToken = connectionString.APIToken;
+            var builder = new UriBuilder(connectionString.Server);
+            builder.UserName = "api-token";
+            builder.Password = vm.APIToken;
+            vm.AuthenticatedUri = builder.ToString();
             return View(nameof(LightningChargeServices), vm);
         }