I have tried to create a vm instance from instance template in Google Cloud by using API from Postman.
API Request:
POST https://compute.googleapis.com/compute/v1/projects/ PROJECT_ID/zones/ZONE/instances?sourceInstanceTemplate=INSTANCE_TEMPLATE_NAME
with body
{
"name": "vm-from-instance-temp",
}
Ref: Create a VM from an instance template | Compute Engine Documentation | Google Cloud
But I got this error messages.