feat(billing): Add cli subcommand for monthly active user counts

internal/tests/cli/boundary/_billing.bash

@@ -0,0 +1,18 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: BUSL-1.1
+
+function active_users_last_two_months() {
+  boundary billing monthly-active-users -format json
+}
+
+function active_users_start_time() {
+  boundary billing monthly-active-users -start-time=$1 -format json
+}
+
+function active_users_start_time_and_end_time() {
+  boundary billing monthly-active-users -start-time=$1 -end-time=$2 -format json
+}
+
+function active_users_end_time() {
+  boundary billing monthly-active-users -end-time=$1 -format json
+}

internal/tests/cli/boundary/billing.bats

@@ -0,0 +1,61 @@
+#!/usr/bin/env bats
+
+load _auth
+load _billing
+load _helpers
+
+@test "boundary/billing: can login as admin user" {
+  run login $DEFAULT_LOGIN
+  [ "$status" -eq 0 ]
+}
+
+@test "boundary/billing: admin user can get last two months" {
+  run active_users_last_two_months
+  [ "$status" -eq 0 ]
+  run has_status_code "$output" "200"
+}
+
+@test "boundary/billing: admin user can get report with start time" {
+  run active_users_start_time "2023-09"
+  [ "$status" -eq 0 ]
+  run has_status_code "$output" "200"
+}
+
+@test "boundary/billing: admin user can get report with start and end times" {
+  run active_users_start_time_and_end_time "2023-09" "2023-12"
+  [ "$status" -eq 0 ]
+  run has_status_code "$output" "200"
+}
+
+@test "boundary/billing: cannot get report with end time before start time" {
+  run active_users_start_time_and_end_time "2023-09" "2023-08"
+  [ "$status" -eq 1 ]
+}
+
+@test "boundary/billing: cannot get report with only end time" {
+  run active_users_end_time "2023-09" 
+  [ "$status" -eq 1 ]
+}
+
+# unpriv tests
+@test "boundary/billing: can login as unpriv user" {
+  run login $DEFAULT_UNPRIVILEGED_LOGIN
+  [ "$status" -eq 0 ]
+}
+
+@test "boundary/billing: default user cannot get last two months" {
+  run active_users_last_two_months
+  [ "$status" -eq 1 ]
+}
+
+@test "boundary/billing: default user cannot get report with start time" {
+  run active_users_start_time "2023-09"
+  [ "$status" -eq 1 ]
+  run has_status_code "$output" "200"
+}
+
+@test "boundary/billing: default user cannot get report with start and end times" {
+  run active_users_start_time_and_end_time "2023-09" "2023-12"
+  [ "$status" -eq 1 ]
+  run has_status_code "$output" "200"
+}