Remove Createdby Parameter from deploy.yml and change logic in bicep

Author: NirajC-Microsoft

.github/workflows/deploy.yml

@@ -137,7 +137,6 @@ jobs:
               imageTag="${IMAGE_TAG}" \
               azureAiServiceLocation='${{ env.AZURE_LOCATION }}' \
               gptModelCapacity=150 \
-              createdBy="Pipeline" \
             --output json
 
       - name: Extract Web App and API App URLs

infra/main.bicep

@@ -170,8 +170,8 @@ var allTags = union(
   },
   tags
 )
-@description('Optional created by user name')
-param createdBy string = empty(deployer().userPrincipalName) ? '' : split(deployer().userPrincipalName, '@')[0] 
+param createdBy string = contains(deployer(), 'userPrincipalName')? split(deployer().userPrincipalName, '@')[0]: deployer().objectId
+ 
 
 resource resourceGroupTags 'Microsoft.Resources/tags@2021-04-01' = {
   name: 'default'