openvidu-deployment: azure - single node - handle empty secrets

openvidu-deployment/community/singlenode/azure/cf-openvidu-singlenode.bicep

@@ -313,7 +313,7 @@ fi
 if [[ "${initialMeetApiKey}" != '' ]]; then
   MEET_INITIAL_API_KEY="$(/usr/local/bin/store_secret.sh save MEET-INITIAL-API-KEY "${initialMeetApiKey}")"
 else
-  MEET_INITIAL_API_KEY="$(/usr/local/bin/store_secret.sh save MEET-INITIAL-API_KEY "none")"
+  MEET_INITIAL_API_KEY="$(/usr/local/bin/store_secret.sh save MEET-INITIAL-API_KEY "")"
 fi
 
 REDIS_PASSWORD="$(/usr/local/bin/store_secret.sh generate REDIS-PASSWORD)"
@@ -665,7 +665,12 @@ if [[ "$MODE" == "generate" ]]; then
 elif [[ "$MODE" == "save" ]]; then
     SECRET_KEY_NAME="$2"
     SECRET_VALUE="$3"
-    az keyvault secret set --vault-name ${keyVaultName} --name $SECRET_KEY_NAME --value $SECRET_VALUE > /dev/null
+    # If empty value, store it empty
+    if [[ -z "$SECRET_VALUE" ]]; then
+      az keyvault secret set --vault-name ${keyVaultName} --name $SECRET_KEY_NAME --file /dev/null > /dev/null
+    else
+      az keyvault secret set --vault-name ${keyVaultName} --name $SECRET_KEY_NAME --value $SECRET_VALUE > /dev/null
+    fi
     if [[ $? -ne 0 ]]; then
         echo "Error generating secret"
     fi