### Request
POST /api/documents/find_or_create.json
{"documents":[{"text":"text1","source":"example1","template_id":16,"template_properties":{"extra":"example text 1"}},{"text":"text2","source":"example2","template_id":16,"template_properties":{"extra":"example text 2"}}],"email":"researcher71@university.edu","auth_token":"a31g_Y7VhW_uNgCiSBMj"}
Content-Type: application/json; charset=utf-8
200 OK
{ "ids": [ 511, 512 ] }