💡Ability to authenticate multiple accounts

**Describe the feature you'd like**
If a tunnel is used for local development there is the potential that a developer would require a different authentication for Personal or Work.

**Describe alternatives you've considered**
I'd like to run one at a time, never both at once.

`cloudflared tunnel run personal`

`cloudflared tunnel run work`

```yml
tunnels:
- tunnel: personal
credentials-file: /root/.cloudflared/personal.json
cert: /root/.cloudflared/personal.pem
ingress:
- hostname: "*.personal.dev"
service: http://127.0.0.1:80
- service: http_status:404
- tunnel: work
credentials-file: /root/.cloudflared/work.json
cert: /root/.cloudflared/work.pem
ingress:
- hostname: "*.work.dev"
service: http://127.0.0.1:80
- service: http_status:404
```

As far as I could tell this isn't possible.