Allow admin login with Azure AD SSO enabled

### Version
22.9.0

### Problem Statement

We use Terraform to spin up our Sentry installation and as part of Terraform code we use custom script to generate Auth token to further expose it to [Sentry Terraform Provider](https://registry.terraform.io/providers/jianyuan/sentry/latest/docs#authentication).

If SSO is not enabled the script uses initial admin credentials to make required API calls to Sentry. Once SSO takes place admin credentials are not working.

### Solution Brainstorm

Would be helpful for our case to be able to access sentry with existing user when SSO enabled. Maybe there is some flag which will allow us to enable it?