Description of problem: To test grafana-dev to setup grafana develop intance first, then to switch the kube:admin to the Grafana admin, but the script running failed, it prompts: Failed to fetch user ID, please check your user name

Version-Release number of selected component (if applicable): 2.8 EC1-1

How reproducible:

Steps to Reproduce:

1. Enabled Observability
2. setup grafana dev instance by command - ./setup-grafana-dev.sh --deploy
3. check the current user

cqu-mac:tools changliangqu$ oc whoami
kube:admin

        4. switch kube:admin to the grafana admin failed, and another odd thing is the command line would not input anything after the switch command  

```

./switch-to-grafana-admin.sh kube:admin
Failed to fetch user ID, please check your user name
                                                    cqu-mac:tools changliangqu$

```

Actual results:

Expected results:

Additional info: