Unable to connect to Azure SQL Server from custom edge module.

从 ModuleBackgroundService.cs 第 46 行开始，该处 SqlConnection.Open() 失败，并在自定义 IoT Edge 模块的上下文中检查报告的 Azure SQL 登录错误。使用提供的设置重现连接尝试，并确定导致登录失败的身份验证或配置细节；当模块成功打开连接，或所需的限制已记录在案时，即视为完成。

Hi Team,

Our customer cannot connect to the Azure SQL server from a custom edge module running on IoT Edge. The custom module gives an error while opening a connection towards the server using the function <conn.Open();>

Please find their below error.

BackgroundService failed System.Data.SqlClient.SqlException (0x80131904): Login failed for user 'username'. at System.Data.ProviderBase.DbConnectionPool.CheckPoolBlockingPeriod(Exception e) at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 retry, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 retry, DbConnectionOptions userOptions) at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) at System.Data.SqlClient.SqlConnection.Open() at sqlfunction.ModuleBackgroundService.ExecuteAsync(CancellationToken cancellationToken) in /app/ModuleBackgroundService.cs:line 46 at Microsoft.Extensions.Hosting.Internal.Host.TryExecuteBackgroundServiceAsync(BackgroundService backgroundService) C5"