Powershell 凭证连接不存在'；行不通

我正在尝试在powershell脚本中使用凭据连接。我试过：

$credential = Get-Credential

及

但当我执行查询时，我得到以下消息：

Invoke-SqlQuery -Query $Query -Server $SERVER -database $DataBase -credential $credential 
Exception calling "Open" with "0" argument(s): "Login failed for user '\sa'."
\Modules\InvokeSqlQuery\InvokeSqlQuery.psm1:155 char:14
+     $cnn.Open <<<< ();
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : DotNetMethodException

这就产生了错误

顺便说一下，我想知道如何加载此程序集：

new-object [System.Management.Automation.PSCredential]
New-Object : Cannot find type [[System.Management.Automation.PSCredential]]: make sure the assembly containing this type is loaded.

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谢谢。

要回答第二个问题：-），包含PSCredential的程序集已加载。它是PowerShell所需的程序集。试试这个：

$username = ConvertTo-SecureString username -AsPlainText -Force
$password = ConvertTo-SecureString pass!word -AsPlainText -Force
$cred = new-object management.automation.pscredential $username,$password

尝试以下操作（PsSnapin:SqlServerCmdletSnapin100）：

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查看加载了哪些程序集的一个简单技巧是：CurrentDomain.GetAssemblys（）|选择ManifestModule |排序ManifestModule另一个技巧是

[appdomain]：：CurrentDomain.GetAssemblys（）| Where Location | Foreach{$|.GetExportedTypes（）}| Where Name-match PSCredential | Format Table Name，程序集-自动调整大小

找不到与参数名称“Username”匹配的参数。事实上，允许的参数是：Invoke SqlQuery[[-Query][-File][-parameters][-Server][-Database][-Credential][-IncludeRecordSetIndex][-includeRecordScont][-ConnectionTimeout][-ExecutionTimeout][WhatIf][Confirm][-UseTransation][这就是我想要实例化凭证的原因。

new-object [System.Management.Automation.PSCredential]
New-Object : Cannot find type [[System.Management.Automation.PSCredential]]: make sure the assembly containing this type is loaded.

$username = ConvertTo-SecureString username -AsPlainText -Force
$password = ConvertTo-SecureString pass!word -AsPlainText -Force
$cred = new-object management.automation.pscredential $username,$password

$pwd = read-host -AsSecureString -Prompt "Password"

Invoke-Sqlcmd -Query $Query -Serverinstance $SERVER -database $DataBase –Username “MyLogin” –Password $pwd