Add description to get credentials for accessing the created cluster. (#466)
Add description to get credentials for accessing the created cluster. (#466)

* Add description to get credentials for accessing the created cluster.

* s/PROJECT/PROJECT_ID/ for getting credentials

Co-authored-by: Megan O'Keefe <b04db65b4589a20a3bb6963e6ecd27813ed97cf8@users.noreply.github.com>
Co-authored-by: Shabir Mohamed Abdul Samadh <73796fb16f01652293c5e9985e404060789c5810@users.noreply.github.com>
GoogleCloudPlatform/bank-of-anthos,GoogleCloudPlatform/bank-of-anthos,GoogleCloudPlatform/bank-of-anthos,GoogleCloudPlatform/bank-of-anthos