[tim@jazzstep-2 tst]$ go run go-driver-auth.go
panic: (Unauthorized) not authorized on admin to execute command { serverStatus: 1, locks: false, recordStats: false, $db: "admin", $readPreference: { mode: "primaryPreferred" } }

goroutine 1 [running]:
main.main()
	/Users/tim/tst/go-driver-auth.go:38 +0x520
exit status 2

2019-02-21T15:23:26.860-0500 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
2019-02-21T15:23:26.877-0500 I CONTROL  [initandlisten] MongoDB starting : pid=74533 port=27017 dbpath=db1 64-bit host=jazzstep-2.local
2019-02-21T15:23:26.877-0500 I CONTROL  [initandlisten] db version v4.0.4
2019-02-21T15:23:26.877-0500 I CONTROL  [initandlisten] git version: f288a3bdf201007f3693c58e140056adf8b04839
2019-02-21T15:23:26.878-0500 I CONTROL  [initandlisten] allocator: system
2019-02-21T15:23:26.878-0500 I CONTROL  [initandlisten] modules: none
2019-02-21T15:23:26.878-0500 I CONTROL  [initandlisten] build environment:
2019-02-21T15:23:26.878-0500 I CONTROL  [initandlisten]     distarch: x86_64
2019-02-21T15:23:26.878-0500 I CONTROL  [initandlisten]     target_arch: x86_64
2019-02-21T15:23:26.878-0500 I CONTROL  [initandlisten] options: { replication: { replSet: "rs0" }, security: { keyFile: "keyfile" }, storage: { dbPath: "db1" } }
2019-02-21T15:23:26.879-0500 I STORAGE  [initandlisten] Detected data files in db1 created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2019-02-21T15:23:26.879-0500 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=7680M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress),
2019-02-21T15:23:27.580-0500 I STORAGE  [initandlisten] WiredTiger message [1550780607:580270][74533:0x119acd5c0], txn-recover: Main recovery loop: starting at 1/22016 to 2/256
2019-02-21T15:23:27.661-0500 I STORAGE  [initandlisten] WiredTiger message [1550780607:661341][74533:0x119acd5c0], txn-recover: Recovering log 1 through 2
2019-02-21T15:23:27.723-0500 I STORAGE  [initandlisten] WiredTiger message [1550780607:723243][74533:0x119acd5c0], txn-recover: Recovering log 2 through 2
2019-02-21T15:23:27.765-0500 I STORAGE  [initandlisten] WiredTiger message [1550780607:765375][74533:0x119acd5c0], txn-recover: Set global recovery timestamp: 0
2019-02-21T15:23:27.836-0500 I RECOVERY [initandlisten] WiredTiger recoveryTimestamp. Ts: Timestamp(0, 0)
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] 
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] ** WARNING: This server is bound to localhost.
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] **          Remote systems will be unable to connect to this server. 
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] **          Start the server with --bind_ip <address> to specify which IP 
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] **          addresses it should serve responses from, or with --bind_ip_all to
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] **          bind to all interfaces. If this behavior is desired, start the
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] **          server with --bind_ip 127.0.0.1 to disable this warning.
2019-02-21T15:23:27.876-0500 I CONTROL  [initandlisten] 
2019-02-21T15:23:27.921-0500 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory 'db1/diagnostic.data'
2019-02-21T15:23:27.926-0500 I REPL     [initandlisten] Did not find local voted for document at startup.
2019-02-21T15:23:27.930-0500 I REPL     [initandlisten] Rollback ID is 1
2019-02-21T15:23:27.930-0500 I REPL     [initandlisten] Did not find local replica set configuration document at startup;  NoMatchingDocument: Did not find replica set configuration document in local.system.replset
2019-02-21T15:23:27.930-0500 I CONTROL  [LogicalSessionCacheRefresh] Sessions collection is not set up; waiting until next sessions refresh interval: Replication has not yet been configured
2019-02-21T15:23:27.930-0500 I NETWORK  [initandlisten] waiting for connections on port 27017
2019-02-21T15:23:27.930-0500 I CONTROL  [LogicalSessionCacheReap] Sessions collection is not set up; waiting until next sessions reap interval: config.system.sessions does not exist
2019-02-21T15:23:39.084-0500 I NETWORK  [listener] connection accepted from 127.0.0.1:62305 #1 (1 connection now open)
2019-02-21T15:23:39.084-0500 I ACCESS   [conn1] note: no users configured in admin.system.users, allowing localhost access
2019-02-21T15:23:39.085-0500 I NETWORK  [listener] connection accepted from 127.0.0.1:62306 #2 (2 connections now open)
2019-02-21T15:23:39.085-0500 I NETWORK  [conn2] received client metadata from 127.0.0.1:62306 conn2: { driver: { name: "mongo-go-driver", version: "v1.0.0-rc1+prerelease" }, os: { type: "darwin", architecture: "amd64" }, platform: "go1.10.5" }
2019-02-21T15:23:39.085-0500 I ACCESS   [conn2] Unauthorized: not authorized on admin to execute command { serverStatus: 1, locks: false, recordStats: false, $db: "admin", $readPreference: { mode: "primaryPreferred" } }
2019-02-21T15:23:39.086-0500 I NETWORK  [conn2] end connection 127.0.0.1:62306 (1 connection now open)
2019-02-21T15:23:39.086-0500 I NETWORK  [conn1] end connection 127.0.0.1:62305 (0 connections now open)