API endpoint that allows Agencies to be viewed.

GET:
Return a list of all the existing users.

MODE:
Normal and Detailed
/2.0.0/agencies/?mode=detailed

FILTERS:
Parameters - 'featured', 'agency_type', 'country_code'
Example - /2.0.0/agencies/?featured=true

SEARCH EXAMPLE:
/2.0.0/agencies/?search=nasa

ORDERING:
Fields - 'id', 'name', 'featured'
Example - /2.0.0/agencies/?ordering=featured

GET /2.0.0/agencies/156/
HTTP 200 OK
Allow: GET
Content-Type: application/json
Vary: Accept

{
    "id": 156,
    "url": "https://ll.thespacedevs.com/2.0.0/agencies/156/",
    "name": "Alliant Techsystems",
    "featured": false,
    "type": "Commercial",
    "country_code": "USA",
    "abbrev": "ATK",
    "description": null,
    "administrator": null,
    "founding_year": null,
    "launchers": "",
    "spacecraft": "",
    "parent": null,
    "launch_library_url": "https://launchlibrary.net/1.4/agency/156",
    "total_launch_count": 0,
    "successful_launches": 0,
    "consecutive_successful_launches": 0,
    "failed_launches": 0,
    "pending_launches": 0,
    "successful_landings": 0,
    "failed_landings": 0,
    "attempted_landings": 0,
    "consecutive_successful_landings": 0,
    "info_url": "http://www.atk.com/",
    "wiki_url": "http://en.wikipedia.org/wiki/Alliant_Techsystems",
    "logo_url": null,
    "image_url": null,
    "nation_url": null,
    "launcher_list": [],
    "spacecraft_list": []
}