Remove a registration or device token

// When unregistering a specific token
DELETE https://api-{application_id}.sendbird.com/v3/users/{user_id}/push/{token_type}/{token}

// When unregistering all device tokens
DELETE https://api-{application_id}.sendbird.com/v3/users/{user_id}/push

// When removing a specific token
{
    "token": ["fP7c4oBk_hU:APA91bEzrb3ks301HRvtXxZEdubB_sEhpPFAb0i3cycvd3E9UvFO7ia2uwu2ms7gR-Ra8AmaRNluCT_0frTWBv45jzPvEwEPeNKaNc0iiHnokHAHo0RTzcXcWvrLXmO1Awft_2k7tfi2"],
    "user": {
        "user_id": "Chris",
        "nickname": "Christopher",
        "profile_url": "https://sendbird.com/main/img/profiles/profile_46_512px.png",
        "metadata": {
            "font_preference": "times new roman",
            "font_color": "black"
        }
    }
}

// When removing all device tokens
{
    "user": {
        "user_id": "Chris",
        "nickname": "Christopher",
        "profile_url": "https://sendbird.com/main/img/profiles/profile_46_512px.png",
        "metadata": {
            "font_preference": "times new roman",
            "font_color": "black"
        }
    }
}