Add missing code samples

Author: hola-soy-milk

content/4.auth/1.quickstart.md

@@ -35,6 +35,8 @@ Log out of the Data Studio. From the Sign In screen, you will see a new option t
 
 Open your terminal and run the following command to register a new user.
 
+::snippets
+#rest
 ```bash [Terminal]
 curl \
 --request POST \
@@ -43,12 +45,29 @@ curl \
 --url 'https://directus.example.com/register'
 ```
 
+#graphql
+```graphql
+mutation {
+	users_register(email: "[email protected]", password: "d1r3ctu5")
+}
+```
+
+#sdk
+```js
+import { createDirectus, rest, registerUser } from '@directus/sdk';
+
+const client = createDirectus('https://directus.example.com').with(rest());
+
+const result = await client.request(registerUser('[email protected]', 'd1r3ctu5'));
+```
+::
+
 Go to the user directory by clicking :icon{name="user-directory"} in the module bar and you should see a new user has been created.
 
 ## Logging In
 
-To log in and get an access token, run the following command.
-
+::snippets
+#rest
 ```bash [Terminal]
 curl \
 --request POST \
@@ -57,6 +76,29 @@ curl \
 --url 'https://directus.example.com/auth/login'
 ```
 
+#graphql
+```graphql
+mutation {
+	auth_login(email: "[email protected]", password: "d1r3ctu5") {
+		access_token
+		refresh_token
+	}
+}
+```
+
+#sdk
+```js
+import { createDirectus, authentication } from '@directus/sdk';
+
+const email = "[email protected]";
+const password = "d1r3ctu5";
+
+const client = createDirectus('http://directus.example.com').with(authentication());
+
+const token = await client.login(email, password);
+```
+::
+
 ## Authenticating Requests
 
 You can use the access token while making requests. If your token has expired, you must refresh it.