<PackageReference Include="Microsoft.Data.SqlClient" Version="7.0.0-preview3.25342.7" />

Microsoft.Data.SqlClient.SqlCredential

public sealed class SqlCredential
SqlCredential provides a more secure way to specify the password for a login attempt using SQL Server Authentication. SqlCredential is comprised of a user id and a password that will be used for SQL Server Authentication. The password in a SqlCredential object is of type SecureString. SqlCredential cannot be inherited. Windows Authentication (Integrated Security = true) remains the most secure way to log in to a SQL Server database.
namespace Microsoft.Data.SqlClient { public sealed class SqlCredential { public SecureString Password { get; } public string UserId { get; } public SqlCredential(string userId, SecureString password); } }