Cannot pass SecureString/PassowrdString to `#!connect mssql`

[cilerler]

When I attempt to provide a connection string via a SecureString/PassowrdString (or secret variable) in a Polyglot Notebook using the #!connect mssql magic command, I get the error: Format of the initialization string does not conform to specification starting at index 0.

This prevents the connection string from being hidden, as it fails to parse from the secured variable. (first screenshot)

When the password is provided in clear text, the connection succeeds, confirming that the variable’s content is correct. (second screenshot)

Additional Context:

Notebook

#!meta

{"kernelInfo":{"defaultKernelName":"csharp","items":[{"aliases":[],"languageName":"csharp","name":"csharp"},{"aliases":[],"languageName":"T-SQL","name":"sql-Integration_myCompany"}]}}

#!pwsh

Get-SecretInfo -Vault DotnetInteractive;

#!csharp

#!set --name myCompanyIntegrationSql --value @password:{"saveAs":"myCompany.integration.sql", "prompt":"Please provide a connection string."}

#!markdown

## Load SQL Library

#!csharp

#r "nuget:Microsoft.DotNet.Interactive.SqlServer,*-*"
//var connectionString = myCompanyIntegrationSql.GetClearTextPassword(); 
//myCompanyIntegrationSql.GetClearTextPassword().Display();

#!csharp

#!connect mssql --kernel-name Integration_myCompany --connection-string @myCompanyIntegrationSql

Stack

Error: System.Exception: Format of the initialization string does not conform to specification starting at index 0.
   at Microsoft.DotNet.Interactive.SqlServer.MsSqlKernel.ConnectAsync()
   at Microsoft.DotNet.Interactive.SqlServer.MsSqlKernelConnector.CreateKernelAsync(String kernelName)
   at Microsoft.DotNet.Interactive.SqlServer.ConnectMsSqlDirective.ConnectKernelsAsync(ConnectMsSqlKernel connectCommand, KernelInvocationContext context)
   at Microsoft.DotNet.Interactive.CompositeKernel.ConnectKernel[TCommand](TCommand command, ConnectKernelDirective`1 connectDirective, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\CompositeKernel.cs:line 253
   at Microsoft.DotNet.Interactive.CompositeKernel.<>c__DisplayClass20_0`1.<<AddConnectDirective>b__0>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\CompositeKernel.cs:line 238
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.Kernel.HandleAsync(KernelCommand command, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\Kernel.cs:line 365
   at Microsoft.DotNet.Interactive.CompositeKernel.HandleAsync(KernelCommand command, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\CompositeKernel.cs:line 194
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<BuildPipeline>b__6_0(KernelCommand command, KernelInvocationContext context, KernelPipelineContinuation _) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 60
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_1.<<BuildPipeline>b__3>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 75
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.App.KernelExtensions.<>c__DisplayClass5_0.<<UseTelemetrySender>b__0>d.MoveNext() in D:\a\_work\1\s\src\dotnet-interactive\KernelExtensions.cs:line 296
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_1.<<BuildPipeline>b__3>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 75
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.App.KernelExtensionLoader.<>c__DisplayClass0_0.<<UseNuGetExtensions>b__0>d.MoveNext() in D:\a\_work\1\s\src\dotnet-interactive\KernelExtensionLoader.cs:line 25
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_1.<<BuildPipeline>b__3>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 75
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.App.KernelExtensions.<>c__DisplayClass4_0.<<UseSecretManager>b__0>d.MoveNext() in D:\a\_work\1\s\src\dotnet-interactive\KernelExtensions.cs:line 227
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_0.<<BuildPipeline>g__Combine|2>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 73
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_0.<<BuildPipeline>g__Combine|2>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 73
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.<>c__DisplayClass6_0.<<BuildPipeline>g__Combine|2>d.MoveNext() in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 73
--- End of stack trace from previous location ---
   at Microsoft.DotNet.Interactive.KernelCommandPipeline.SendAsync(KernelCommand command, KernelInvocationContext context) in D:\a\_work\1\s\src\Microsoft.DotNet.Interactive\KernelCommandPipeline.cs:line 41

Note

I initially raised this topic in a #3789, and now I'm creating this issue to track what appears to be a bug and continue the conversation here.

Screenshots

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2. 

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