cr, err := client.Permission.LookupSubject(context.Background(), &v1.PermissionLookupSubjectRequest{
    TenantId: "t1",
    Metadata: &v1.PermissionLookupSubjectRequestMetadata{
        SnapToken: "",
        SchemaVersion: "",
        Depth: 20,
    },
    Entity: &v1.Entity{
        Type: "document",
        Id: "1",
    },
    Permission: "edit",
    SubjectReference: &v1.RelationReference{
        Type: "user",
        Relation: "",
    },
    PageSize: 20,
    ContinuousToken: "",
})

client.permission.lookupSubject({
    tenantId: "t1",
    metadata: {
        snapToken: "",
        schemaVersion: "",
        depth: 20,
    },
    entity: {
        type: "document",
        id: "1",
    },
    permission: "edit",
    subject_reference: {
        type: "user",
        relation: ""
    },
    page_size: 10,
    continuous_token: ""
}).then((response) => {
    console.log(response.subject_ids)
})

curl --location --request POST 'localhost:3476/v1/tenants/{tenant_id}/permissions/lookup-subject' \
--header 'Content-Type: application/json' \
--data-raw '{
  "metadata":{
    "snap_token": "",
    "schema_version": "",
    "depth": 20,
  },
  "entity": {
    "type": "document",
    "id": "1"
  },
  "permission": "edit",
  "subject_reference": {
    "type": "user",
    "relation": ""
  },
   page_size: 20,
   continuous_token: ""
}'

{
  "subject_ids": [
    "<string>"
  ],
  "continuous_token": "<string>"
}

{
  "code": 123,
  "message": "<string>",
  "details": [
    {
      "@type": "<string>"
    }
  ]
}