How to post a relation in json body postman

System Information
  • v4:
  • Windows:
  • Postgres:
  • 16:

So I have a api in [Preformatted text](http://localhost:1337/api/users) contain user and in every user it have a relation of a profile. For example if I get a single user in postman it show result

        "id": 45,
        "username": "test",
        "email": "",
        "provider": "local",
        "confirmed": true,
        "blocked": false,
        "createdAt": "2022-07-18T08:50:43.642Z",
        "updatedAt": "2022-07-18T08:50:43.642Z",
        "profile": null

As you can see in profile it get null value but when I tried to post a new profile in profile api using this [Preformatted text](http://localhost:1337/api/profiles?populate=*) with a body request of json

    "data" : {
    "name": "fgh",
    "address": "jksdjkdjs",
    "phone": "345345" 

It worked and show the result of

    "data": {
        "id": 10,
        "attributes": {
            "name": "fgh",
            "address": "jksdjkdjs",
            "phone": 345345,
            "createdAt": "2022-08-05T13:37:10.282Z",
            "updatedAt": "2022-08-05T13:37:10.282Z",
            "publishedAt": "2022-08-05T13:37:10.281Z",
            "email": {
                "data": null
    "meta": {}

but how We can post the relation of the user or connect existing email in api user to api profile?.

maybe this guide could help you.