我正在使用 Azure 搜索 API 来放置数据源：
"name" : "XXX",
"type" : "azuresql",
"credentials" : { "connectionString" : "Server=tcp:XXX.database.windows.net,1433;Database=XXX;User ID=XXX@XXX;Password=XXX;Trusted_Connection=False;Encrypt=True;Connection Timeout=600;" },
"container" : { "name" : "[dbo].[v_XXX]" },
"dataChangeDetectionPolicy" : { "@odata.type" : "#Microsoft.Azure.Search.HighWaterMarkChangeDetectionPolicy", "highWaterMarkColumnName" : "rowVersion" }
并且创建了数据源，但是当我尝试获取数据源时，它缺少连接字符串值：
"@odata.context": "https://XXX.search.windows.net/$metadata#datasources/$entity",
"name": "XXX",
"description": null,
"type": "azuresql",
"credentials": {
"connectionString": null
},
"container": {
"name": "[dbo].[v_XXX]",
"query": null
},
"dataChangeDetectionPolicy": {
"@odata.type": "#Microsoft.Azure.Search.HighWaterMarkChangeDetectionPolicy",
"highWaterMarkColumnName": "rowVersion"
},
"dataDeletionDetectionPolicy": null
这（我想）在索引器过程中导致我出现以下错误：
"status": "transientFailure",
"errorMessage": "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding."
如何验证导致丢失连接字符串问题的原因？