Add show user command

[tjmoore4]

Adds a command to show the contents of the pguser Secrets.

Issue: PGO-470

[tony-landreth]

It doesn't look like the command works when I set the user through the spec:

spec:
  users:
    - name: rhino
      databases:
        - zoo

[benjaminjb]

It doesn't look like the command works when I set the user through the spec:

spec:
  users:
    - name: rhino
      databases:
        - zoo

What are you seeing?

If I set two users in the spec, one with the databases field filled out, like

    users:
    - name: hippo
      databases:
      - zoo
    - name: rhino

then the show user command just lists them (which is pretty boring now that I think of it):

➜ ./bin/kubectl-pgo show user hippo -n postgres-operator                       
CLUSTER  USERNAME
-------  --------
hippo    rhino
hippo    hippo

And then if I ask for the connection info, I get the databases[0] listed, as per the secret:

➜  ./bin/kubectl-pgo show user hippo hippo -n postgres-operator --show-connection-info
WARNING: This command will show sensitive password information.
Are you sure you want to continue? (yes/no): yes
Connection information for hippo for hippo cluster
Connection info string:
    dbname=zoo host=hippo-primary.postgres-operator.svc port=5432 user=hippo password=<password>
Connection URL:
    postgres://<password>[email protected]:5432/zoo

[benjaminjb]

The show user without connection info is pretty boring, but I think we have some ideas abt making that command more like v4 in the future, i.e., pull info from the db.

[benjaminjb]

Current usage:

[tjmoore4]

⛏️ Not a blocker, but I'd like function renames unrelated to the current feature to be in a separate commit (same for getHA as well).

[benjaminjb]

Pushed new commits to separate that.

[tjmoore4]

⛏️ extra newline

[tjmoore4]

❓ Should we have a user value here? For a cluster named hippo (and based on this example ), I'd expect something like

Connection URL:
    postgres://user:[email protected]:5432/hippo

So the code might be

cmd.Println("    postgres://" + string(secret.Data["user"]) + ":" + string(secret.Data["password"]) +

[benjaminjb]

Ooh, good catch

[tjmoore4]

👍 Updates look good to me.