why am I getting exception: login failed while trying to log in to mongodb?

Question

First I logged in as administrator to my mongodb:

sudo mongo admin --username root --password XXXXXXXX

then I created another user with root role:

> use admin 
> db.createUser(
    {
      user: "myuser",
      pwd: "myPassw",
      roles: [ "root" ]
    }
)

then I wrote:

> db.getUsers()

and my user was there:

{
    "_id" : "admin.root",
    "user" : "root",
    "db" : "admin",
    "roles" : [
        {
            "role" : "readWriteAnyDatabase",
            "db" : "admin"
        },
        {
            "role" : "userAdminAnyDatabase",
            "db" : "admin"
        },
        {
            "role" : "dbAdminAnyDatabase",
            "db" : "admin"
        },
        {
            "role" : "clusterAdmin",
            "db" : "admin"
        }
    ]
},
{
    "_id" : "admin.myuser",
    "user" : "myuser",
    "db" : "admin",
    "roles" : [
        {
            "role" : "root",
            "db" : "admin"
        }
    ]
}

Now when I try to log in:

sudo mongo admin --username myuser --password myPassw
MongoDB shell version: 3.2.1
connecting to: /opt/bitnami/mongodb/tmp/mongodb-27017.sock:27017/admin
2016-02-10T21:23:53.964+0000 E QUERY    [thread1] Error: Authentication failed. :
DB.prototype._authOrThrow@src/mongo/shell/db.js:1395:16
@(auth):6:1
@(auth):1:2

exception: login failed

What is the reason of that? I restarted the mongodb process but it didn't help.

=======EDIT:

after following Robbie advice I ran the command without sudo and unfortunately this is the result:

bitnami@ip-172-31-47-102:~/stack$ mongo admin -u myuser -p myPassw
MongoDB shell version: 3.2.1
connecting to: /opt/bitnami/mongodb/tmp/mongodb-27017.sock:27017/admin
2016-02-10T21:56:15.615+0000 W NETWORK  [thread1] Failed to connect to /opt/bitnami/mongodb/tmp/mongodb-27017.sock:0, reason: errno:13 Permission denied
2016-02-10T21:56:15.615+0000 E QUERY    [thread1] Error: couldn't connect to server /opt/bitnami/mongodb/tmp/mongodb-27017.sock:27017, connection attempt failed :
connect@src/mongo/shell/mongo.js:226:14
@(connect):1:6

exception: connect failed

Answer 1

I found the solution ,

Symbol in password was the issue as i had $ sign , changing password with no symbol worked for me !!