Merge pull request #137 from dgraph-io/bucanero/patch-1

Update README.md

Author: bucanero

README.md

@@ -69,6 +69,7 @@ use a different version of this client.
 |     1.0.X      |      *1.X.Y*      |
 |     1.1.X      |      *2.X.Y*      |
 |    20.03.0     |     *20.03.0*     |
+|    21.03.0     |     *21.03.0*     |
 
 Note: Only API breakage from *v1.X.Y* to *v2.X.Y* is in
 the function `DgraphClient.newTxn().mutate()`. This function returns a `messages.Assigned`
@@ -105,6 +106,37 @@ const dgraphClient = new dgraph.DgraphClient(clientStub);
 
 To facilitate debugging, [debug mode](#debug-mode) can be enabled for a client.
 
+### Multi-tenancy
+
+In [multi-tenancy](https://dgraph.io/docs/enterprise-features/multitenancy) environments, `dgraph-js` provides a new method `loginIntoNamespace()`,
+which will allow the users to login to a specific namespace.
+
+In order to create a JavaScript client, and make the client login into namespace `123`:
+
+```js
+const dgraphClientStub = new dgraph.DgraphClientStub("localhost:9080");
+await dgraphClientStub.loginIntoNamespace("groot", "password", 123); // where 123 is the namespaceId 
+```
+
+In the example above, the client logs into namespace `123` using username `groot` and password `password`.
+Once logged in, the client can perform all the operations allowed to the `groot` user of namespace `123`.
+
+### Creating a Client for Dgraph Cloud Endpoint
+
+If you want to connect to Dgraph running on your [Dgraph Cloud](https://cloud.dgraph.io) instance, then all you need is the URL of your Dgraph Cloud endpoint and the API key. You can get a client using them as follows:
+
+```js
+const dgraph = require("dgraph-js");
+
+const clientStub = dgraph.clientStubFromSlashGraphQLEndpoint(
+  "https://frozen-mango.eu-central-1.aws.cloud.dgraph.io/graphql",
+  "<api-key>"
+);
+const dgraphClient = new dgraph.DgraphClient(clientStub);
+```
+
+**Note:** the `clientStubFromSlashGraphQLEndpoint` method is deprecated and will be removed in the next release.
+
 ### Altering the Database
 
 To set the schema, create an `Operation` object, set the schema and pass it to