List Module Namespaces

This endpoint lists module namespaces by various filters.

To list module namespaces accessible from a certain environment, filter[environment] has to be
specified. Module namespaces from the account which this environment belongs to will be listed as well.

To list module namespaces accessible from a certain account, filter[account] has to be specified.

If no filters were specified, all module namespaces which the user has read access to will be
listed.