Fix pattern

CloudError.cs

@@ -0,0 +1,62 @@
+// <auto-generated>
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Azure.Security.Insights.ArmClient
+{
+    using Microsoft.Rest;
+    using Microsoft.Rest.Serialization;
+    using Newtonsoft.Json;
+    using System.Linq;
+
+    /// <summary>
+    /// Error response structure.
+    /// </summary>
+    [Rest.Serialization.JsonTransformation]
+    public partial class CloudError
+    {
+        /// <summary>
+        /// Initializes a new instance of the CloudError class.
+        /// </summary>
+        public CloudError()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CloudError class.
+        /// </summary>
+        /// <param name="code">An identifier for the error. Codes are invariant
+        /// and are intended to be consumed programmatically.</param>
+        /// <param name="message">A message describing the error, intended to
+        /// be suitable for display in a user interface.</param>
+        public CloudError(string code = default(string), string message = default(string))
+        {
+            Code = code;
+            Message = message;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets an identifier for the error. Codes are invariant and are
+        /// intended to be consumed programmatically.
+        /// </summary>
+        [JsonProperty(PropertyName = "error.code")]
+        public string Code { get; private set; }
+
+        /// <summary>
+        /// Gets a message describing the error, intended to be suitable for
+        /// display in a user interface.
+        /// </summary>
+        [JsonProperty(PropertyName = "error.message")]
+        public string Message { get; private set; }
+
+    }
+}

specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2023-07-01-preview/dataConnectorDefinitions.json

@@ -727,7 +727,7 @@
       "description": "The data connector definition name.",
       "required": true,
       "type": "string",
-      "pattern": "^[a-z0-9-]*$",
+      "pattern": "^[a-z0-9A-Z-_]*$",
       "x-ms-parameter-location": "method"
     }
   }