add PMI update in doc (#465)

* few more changes

* few more changes

---------

Co-authored-by: vtomar <vtomar@microsoft.com>

Author: Vijendra123

infrastructure/infrastructure-setup-bicep/01-connections/apim-and-modelgateway-integration-guide.md

@@ -207,7 +207,7 @@ Specialized connections designed for Azure API Management integration scenarios.
 
 **🔐 Authentication Support:**
 - **🔑 API Key**: Subscription key authentication
-- **🆔 Microsoft Entra ID**: Azure Active Directory integration (coming soon)
+- **🆔 Microsoft Entra ID**: Project Managed Identity
 
 📋 **Detailed Configuration**: [APIM Connection Objects](./apim/APIM-Connection-Objects.md)
 

infrastructure/infrastructure-setup-bicep/01-connections/apim/apim-setup-guide-for-agents.md

@@ -387,16 +387,22 @@ First, install the required Python package:
 pip install requests
 ```
 
-Then run the validation script:
+Then run the validation script (use ONE of the authentication methods):
 ```bash
-# For APIM connection testing:
+# For ApiKey authentication (uses APIM subscription key):
 python3 test_apim_connection.py --params samples/YOUR_CHOSEN_FILE.json --api-key YOUR_APIM_SUBSCRIPTION_KEY --deployment-name YOUR_DEPLOYMENT --target-url YOUR_APIM_BASE_URL
+
+# For ProjectManagedIdentity authentication (uses Authorization header):
+python3 test_apim_connection.py --params samples/YOUR_CHOSEN_FILE.json --authorization "Bearer YOUR_TOKEN" --deployment-name YOUR_DEPLOYMENT --target-url YOUR_APIM_BASE_URL
 ```
 
 **Example:**
 ```bash
-# Complete example with actual values
+# ApiKey auth example
 python3 test_apim_connection.py --params samples/parameters-static-models.json --api-key abc123def456 --deployment-name gpt-4o --target-url https://my-apim.azure-api.net/foundry/models
+
+# ProjectManagedIdentity auth example (with Bearer token)
+python3 test_apim_connection.py --params samples/parameters-static-models.json --authorization "Bearer eyJ0eXAi..." --deployment-name gpt-4o --target-url https://my-apim.azure-api.net/foundry/models
 ```
 
 This validation script tests:

infrastructure/infrastructure-setup-bicep/01-connections/apim/connection-apim.bicep

@@ -110,6 +110,7 @@ var validationMessage = bothConfiguredError ? 'ERROR: Cannot configure both stat
 var neitherConfiguredError = !hasModelDiscovery && !hasStaticModels
 var neitherConfiguredMessage = 'ERROR: Must configure either static models (staticModels array) OR dynamic discovery (listModelsEndpoint, getModelEndpoint, deploymentProvider). Cannot have neither.'
 
+
 // Force deployment failure if both are configured
 resource deploymentValidation 'Microsoft.Resources/deploymentScripts@2023-08-01' = if (bothConfiguredError) {
   name: 'validation-error-${uniqueString(resourceGroup().id)}'
@@ -134,6 +135,7 @@ resource configValidation 'Microsoft.Resources/deploymentScripts@2023-08-01' = i
   }
 }
 
+
 // Build metadata using conditional union - includes only non-empty parameters
 var metadata = union(
   // Always include basic configuration