What is the default username and password in tiup playground?

[ottok]

The command tiup playground nicely starts a complete TiDB cluster with monitoring and all for testing purposes, and I am able to open the login pages advertised in the output:

# tiup playground
Checking updates for component playground... 
A new version of playground is available:  -> v1.16.2

    To update this component:   tiup update playground
    To update all components:   tiup update --all

The component `playground` version  is not installed; downloading from repository.
download https://tiup-mirrors.pingcap.com/playground-v1.16.2-linux-amd64.tar.gz 8.20 MiB / 8.20 MiB 100.00% ? MiB/s                                                                          

Note: Version constraint  is resolved to v8.5.1. If you'd like to use other versions:

    Use exact version:      tiup playground v7.1.0
    Use version range:      tiup playground ^5
    Use nightly:            tiup playground nightly

The component `pd` version v8.5.1 is not installed; downloading from repository.
download https://tiup-mirrors.pingcap.com/pd-v8.5.1-linux-amd64.tar.gz 54.32 MiB / 54.32 MiB 100.00% 28.98 MiB/s                                                                             
Start pd instance: v8.5.1
The component `tikv` version v8.5.1 is not installed; downloading from repository.
download https://tiup-mirrors.pingcap.com/tikv-v8.5.1-linux-amd64.tar.gz 364.63 MiB / 364.63 MiB 100.00% 30.98 MiB/s                                                                         
Start tikv instance: v8.5.1
The component `tidb` version v8.5.1 is not installed; downloading from repository.
download https://tiup-mirrors.pingcap.com/tidb-v8.5.1-linux-amd64.tar.gz 91.70 MiB / 91.70 MiB 100.00% 31.10 MiB/s                                                                           
Start tidb instance: v8.5.1
Waiting for tidb instances ready
- TiDB: 127.0.0.1:4000 ... Done
The component `prometheus` version v8.5.1 is not installed; downloading from repository.
download https://tiup-mirrors.pingcap.com/prometheus-v8.5.1-linux-amd64.tar.gz 122.53 MiB / 122.53 MiB 100.00% 12.48 MiB/s                                                                   
download https://tiup-mirrors.pingcap.com/grafana-v8.5.1-linux-amd64.tar.gz 50.18 MiB / 50.18 MiB 100.00% 99.39 MiB/s                                                                        
The component `tiflash` version v8.5.1 is not installed; downloading from repository.
download https://tiup-mirrors.pingcap.com/tiflash-v8.5.1-linux-amd64.tar.gz 509.42 MiB / 509.42 MiB 100.00% 29.61 MiB/s                                                                      
Start tiflash instance: v8.5.1
Waiting for tiflash instances ready
- TiFlash: 127.0.0.1:3930 ... Done

🎉 TiDB Playground Cluster is started, enjoy!

Connect TiDB:    mysql --comments --host 127.0.0.1 --port 4000 -u root
TiDB Dashboard:  http://127.0.0.1:2379/dashboard
Grafana:         http://127.0.0.1:3000

However it does not state anywhere what is the default username and password?

For TiDB console the username is 'root' and no password is needed?

In components/grafana/v8.5.1/conf/defaults.ini I see the default user is 'root' but no password is defined, and both username and password are required to login to Grafana. Where can I find the password?

[ottok]

Answering myself: I found on page https://docs.pingcap.com/tidb/stable/quick-start-with-tidb/

TiDB Dashboard: http://127.0.0.1:2379/dashboard. The default username is root, and the password is empty.

Grafana: http://127.0.0.1:3000/. Both the default username and password are admin.