Integration with cloud providers can be achieved by fetching a list of exported cloud provider accounts using cloud_providers_collector_get_providers(). This function returns a list of #CloudProvidersProvider objects that can then be used to obtain details about the providers. Each #CloudProvidersProvider holds a list of #CloudProvidersAccount that can be query using cloud_providers_provider_get_accounts().
To get notified about changes in either the #CloudProvidersProvider or each of their #CloudProvidersAccount you can connect to the "notify::" signal of each of their properties. Any UI elements should be updated after receiving this signal.
Besides the account details, #CloudProvidersAccount may also export a #GMenuModel and a #GActionGroup to provide actions that are related with the account. Those can be obtained by calling cloud_providers_account_get_menu_model() and cloud_providers_account_get_action_group().