DOC-4440 added auth command examples using Jedis class (#4058)

* DOC-4440 added placeholder for auth command examples

* DOC-4440 added auth command examples using Jedis class

src/test/java/io/redis/examples/CmdsCnxmgmtExample.java

@@ -0,0 +1,49 @@
+// EXAMPLE: cmds_cnxmgmt
+// REMOVE_START
+package io.redis.examples;
+
+import org.junit.Assert;
+import org.junit.Test;
+// REMOVE_END
+
+import redis.clients.jedis.Jedis;
+
+// HIDE_START
+public class CmdsCnxmgmtExample {
+    @Test
+    public void run() {
+// HIDE_END
+        Jedis jedis = new Jedis("redis://localhost:6379");
+
+        // STEP_START auth1
+        // REMOVE_START
+        jedis.configSet("requirepass", "temp_pass");
+        // REMOVE_END
+        // Note: you must use the `Jedis` class rather than `UnifiedJedis`
+        // to access the `auth` commands.
+        String authResult1 = jedis.auth("default",  "temp_pass");
+        System.out.println(authResult1); // >>> OK
+        // REMOVE_START
+        Assert.assertEquals("OK", authResult1);
+        jedis.configSet("requirepass", "");
+        // REMOVE_END
+        // STEP_END
+
+        // STEP_START auth2
+        // REMOVE_START
+        jedis.aclSetUser("test-user", "on", ">strong_password", "+acl");
+        // REMOVE_END
+        // Note: you must use the `Jedis` class rather than `UnifiedJedis`
+        // to access the `auth` commands.
+        String authResult2 = jedis.auth("test-user", "strong_password");
+        System.out.println(authResult2); // >>> OK
+        // REMOVE_START
+        Assert.assertEquals("OK", authResult2);
+        jedis.aclDelUser("test-user");
+        // REMOVE_END
+        // STEP_END
+
+        // HIDE_START
+    }
+}
+// HIDE_END