ee auth not working on MU subdom site

## issue

`ee auth` puts http auth on Main site but it is not working on subdom sites.

## Replication steps
```bash
ee site create example.com --type=wp --public-dir=current --mu=subdom --debug
# create a new subdom site a.example.com
ee auth create example.com --user=user --pass=password
# Auth will be there for example.com only
```
## System Information
- [x] ee cli info
EE 4.3.1
- [x] lsb_release -a
```
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal
```
- [x] docker version
```
Client: Docker Engine - Community
Version: 20.10.7
API version: 1.41
Go version: go1.13.15
Git commit: f0df350
Built: Wed Jun 2 11:56:38 2021
OS/Arch: linux/amd64
Context: default
Experimental: true

Server: Docker Engine - Community
Engine:
Version: 20.10.7
API version: 1.41 (minimum version 1.12)
Go version: go1.13.15
Git commit: b0f5bc3
Built: Wed Jun 2 11:54:50 2021
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.6
GitCommit: d71fcd7d8303cbf684402823e425e9dd2e99285d
runc:
Version: 1.0.0-rc95
GitCommit: b9ee9c6314599f1b4a7f497e1f1f856fe433d3b7
docker-init:
Version: 0.19.0
GitCommit: de40ad0
```
- [x] docker-compose version
```
docker-compose version 1.22.0, build f46880fe
docker-py version: 3.4.1
CPython version: 3.6.6
OpenSSL version: OpenSSL 1.1.0f 25 May 2017
```