I set up a cluster on MongoDB Atlas and made myself the admin but I'm having trouble connecting to the Cluster from the shell. On Atlas, I clicked the connect button, clicked connect with Mongo Shell, downloaded the latest Mongo Shell, and copied the command to connect to the cluster:

```
mongo "mongodb://testcluster-shard-00-00-acqhf.mongodb.net:27017,testcluster-shard-00-01-acqhf.mongodb.net:27017,testcluster-shard-00-02-acqhf.mongodb.net:27017/test?replicaSet=TestCluster-shard-0" --authenticationDatabase admin --ssl --username <USERNAME> --password <PASSWORD>

```

When I run this command I get the stream:

```
MongoDB shell version v3.4.10
connecting to: mongodb://testcluster-shard-00-00-
acqhf.mongodb.net:27017,testcluster-shard-00-01-
acqhf.mongodb.net:27017,testcluster-shard-00-02-
acqhf.mongodb.net:27017/test?replicaSet=TestCluster-shard-0
2017-11-20T11:58:31.883-0500 I NETWORK  [thread1] Starting new replica set monitor for TestCluster-shard-0/testcluster-shard-00-00-
acqhf.mongodb.net:27017,testcluster-shard-00-01-
acqhf.mongodb.net:27017,testcluster-shard-00-02-acqhf.mongodb.net:27017
2017-11-20T11:58:32.119-0500 I NETWORK  [thread1] Successfully connected to testcluster-shard-00-01-acqhf.mongodb.net:27017 (1 connections now open to testcluster-shard-00-01-acqhf.mongodb.net:27017 with a 5 second timeout)
2017-11-20T11:58:32.131-0500 I NETWORK  [ReplicaSetMonitor-TaskExecutor-0] Successfully connected to testcluster-shard-00-00-acqhf.mongodb.net:27017 (1 connections now open to testcluster-shard-00-00-acqhf.mongodb.net:27017 with a 5 second timeout)
MongoDB server version: 3.4.10
2017-11-20T11:58:32.407-0500 I NETWORK  [ReplicaSetMonitor-TaskExecutor-0] Successfully connected to testcluster-shard-00-02-acqhf.mongodb.net:27017 (1 connections now open to testcluster-shard-00-02-acqhf.mongodb.net:27017 with a 5 second timeout)
2017-11-20T11:58:32.497-0500 I NETWORK  [thread1] Marking host testcluster-shard-00-01-acqhf.mongodb.net:27017 as failed :: caused by :: Location8000: can't authenticate against replica set node testcluster-shard-00-01-acqhf.mongodb.net:27017: bad auth Authentication failed.
2017-11-20T11:58:32.639-0500 I NETWORK  [thread1] Successfully connected to testcluster-shard-00-02-acqhf.mongodb.net:27017 (1 connections now open to testcluster-shard-00-02-acqhf.mongodb.net:27017 with a 0 second timeout)
2017-11-20T11:58:32.756-0500 I NETWORK  [thread1] Marking host testcluster-shard-00-02-acqhf.mongodb.net:27017 as failed :: caused by :: Location8000: can't authenticate against replica set node testcluster-shard-00-02-acqhf.mongodb.net:27017: bad auth Authentication failed.
2017-11-20T11:58:32.899-0500 I NETWORK  [thread1] Successfully connected to testcluster-shard-00-00-acqhf.mongodb.net:27017 (1 connections now open to testcluster-shard-00-00-acqhf.mongodb.net:27017 with a 0 second timeout)
2017-11-20T11:58:32.995-0500 I NETWORK  [thread1] Marking host testcluster-shard-00-00-acqhf.mongodb.net:27017 as failed :: caused by :: Location8000: can't authenticate against replica set node testcluster-shard-00-00-acqhf.mongodb.net:27017: bad auth Authentication failed.
2017-11-20T11:58:33.100-0500 I NETWORK  [thread1] Marking host testcluster-shard-00-01-acqhf.mongodb.net:27017 as failed :: caused by :: Location8000: can't authenticate against replica set node testcluster-shard-00-01-acqhf.mongodb.net:27017: bad auth Authentication failed.
2017-11-20T11:58:33.101-0500 E QUERY    [thread1] Error: can't authenticate against replica set node testcluster-shard-00-01-acqhf.mongodb.net:27017: bad auth Authentication failed. :
DB.prototype._authOrThrow@src/mongo/shell/db.js:1461:20
@(auth):6:1
@(auth):1:2
exception: login failed

```

I replace the and with my username and password but I still can't connect. Do I need to have mongod running in the background? If not what do I need to do to successfully connect? Thank you.