Aggregate result group objects - mongodb

Question

Where I arrived was this I needed to put the user data on the athele:
{
"_id" : ObjectId("5963c6aa1aaf2c1c702ea86f"),
"updatedAt" : ISODate("2017-07-10T18:25:46.941+0000"),
"createdAt" : ISODate("2017-07-10T18:25:46.933+0000"),
"name" : "athleta01",
"nickname" : "01",
"email" : "aaaa#terra.com.br",
"birthday" : ISODate("1986-09-15T03:00:00.000+0000"),
"gender" : "0",
"disable" : false,
"deletedAt" : false,
"profile" : [
{
"departament" : ObjectId("5963c6281aaf2c1c702ea86c"),
"profession" : "athlete",
"_id" : ObjectId("5963c6aa1aaf2c1c702ea870")
}
],
"photo" : null,
"__v" : NumberInt(0)
}
doc Athlete:
{
"_id" : ObjectId("5963c6aa1aaf2c1c702ea871"),
"updatedAt" : ISODate("2017-07-10T19:53:08.285+0000"),
"createdAt" : ISODate("2017-07-10T18:25:46.948+0000"),
"position" : "atacante",
"shirt" : NumberInt(15),
"document" : "87956421345",
"weight" : "10.5",
"height" : "2.73",
"profileId" : ObjectId("5963c6aa1aaf2c1c702ea870"),
"disable" : false,
"deletedAt" : false,
"device" : {
"activityLevel" : "vai atuazliar",
"maxHeartRate" : NumberInt(45),
"reposeHeartRate" : NumberInt(90),
"codSensor" : "1a2s4e1s"
},
"__v" : NumberInt(0)
}
Already tried to make the exit with the project and to set up a group also I did not have the result that I expected. I think I'm missing out on some point.
db.users.aggregate(
[
{
$match: {
"profile.departament" : ObjectId("5963c6281aaf2c1c702ea86c")
}
},
{
$lookup: {
"from" : "institution",
"localField" : "profile.departament",
"foreignField" : "departament._id",
"as" : "user_departament"
}
},
{
$lookup: {
"from" : "athlete",
"localField" : "profile._id",
"foreignField" : "profileId",
"as" : "athlete_departament"
}
},
{
$unwind: {
path: "$athlete_departament",
preserveNullAndEmptyArrays: true
}
},
{
$lookup: {
from: "users",
localField: "athlete_departament.profileId",
foreignField: "profile._id",
as: "username",
}
},
{
$group: {
_id: { name: "$user_departament.name", cnpj: "$user_departament.cnpj", photo: "$user_departament.photo"},
departaments: {
$push : "$user_departament.departament"
},
athletes: {
$push : '$athlete_departament',
}
}
},
{$unwind : "$departaments"},
{$unwind : "$departaments"},
{$unwind : "$_id.name"},
{$unwind : "$_id.cnpj"},
{$unwind : "$_id.photo"},
{$unwind : "$athletes"},
{$unwind : "$athletes"},
{
$group : {
_id : "$_id",
departaments : {$addToSet : "$departaments"},
athletes : {$addToSet : "$athletes"}
}
},
{ "$project": {
//_id : { name: "$_id", departaments: { $concatArrays: [ {$arrayElemAt: [ "$departaments", 0 ]}, "$profiles", "$athletes" ] }}
_id : { institution: "$_id", departaments: { info: "$departaments", profiles: "$profiles", athletes: { username: "$username", athlete: "$athletes" }, }}
//_id : { name: "$_id", departaments: { "departament": { $concatArrays: [ { $arrayElemAt: ["$departaments", 0]}, "$athletes" ] }}}
//_id : { name: "$_id", departaments: { $concatArrays: [ {$arrayElemAt: [ "$departaments", 0 ]}, "$profiles", "$athletes" ] }}
}},
{$unwind : "$_id.departaments.info"},
{$unwind : "$_id.departaments.info"}
]);