str, err := client.Permission.LookupEntityStream(context.Background(), &v1.PermissionLookupEntityRequest{
    Metadata: &v1.PermissionLookupEntityRequestMetadata{
        SnapToken: "",
        SchemaVersion: "",
        Depth: 50,
    },
    EntityType: "document",
    Permission: "view",
    Subject: &v1.Subject{
        Type: "user",
        Id: "1",
    },
    PageSize: 20,
    ContinuousToken: "",
})

// handle stream response
for {
    res, err := str.Recv()

    if err == io.EOF {
        break
    }

    // res.EntityId
}

const permify = require("@permify/permify-node");
const {PermissionLookupEntityStreamResponse} = require("@permify/permify-node/dist/src/grpc/generated/base/v1/service");

function main() {
    const client = new permify.grpc.newClient({
        endpoint: "localhost:3478",
    });

    let res = client.permission.lookupEntityStream({
        metadata: {
            snapToken: "",
            schemaVersion: "",
            depth: 20
        },
        entityType: "document",
        permission: "view",
        subject: {
            type: "user",
            id: "1"
        },
        page_size: 20,
        continuous_token: ""
    });

    handle(res);
}

async function handle(res: AsyncIterable<PermissionLookupEntityStreamResponse>) {
    for await (const response of res) {
        // response.entityId
    }
}

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

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