Create admin account in SailPoint INow automatically

You can use the following API to change the User level of an identity
{{baseUrl}}/v3/auth-users/:id
with PATCH request and body as below:

[
  {
    "op": "replace",
    "path": "/capabilities",
    "value": ["ORG_ADMIN"]
  }
]

To automate the process you can create a workflow that will send a request to this API with id of the identity.