only get cluster name 

```
Using project "default".
+ python3 generate_managedclusters_data.py
++ jq '.managedClusters | length' managedClusters.json
+ [[ 1 > 0 ]]
++ cat managedClusters.json
++ jq -r '.managedClusters[0].name'
+ export CYPRESS_OPTIONS_MANAGED_CLUSTER_NAME=clc-auto-gcp1109
+ CYPRESS_OPTIONS_MANAGED_CLUSTER_NAME=clc-auto-gcp1109
++ cat managedClusters.json
++ jq -r '.managedClusters[0].username'
+ export CYPRESS_OPTIONS_MANAGED_USER=null
+ CYPRESS_OPTIONS_MANAGED_USER=null
++ cat managedClusters.json
++ jq -r '.managedClusters[0].password'
+ export CYPRESS_OPTIONS_MANAGED_PASSWORD=null
+ CYPRESS_OPTIONS_MANAGED_PASSWORD=null
++ cat managedClusters.json
++ jq -r '.managedClusters[0].base_domain'
+ export CYPRESS_OPTIONS_MANAGED_BASEDOMAIN=null
+ CYPRESS_OPTIONS_MANAGED_BASEDOMAIN=null
```

successful example: