...

1. Establish a connection to MongoDB via mongo CLI (see Connect to MongoDB with mongo CLI)
   
   

2. Switch to admin db with use admin

   No Format
   > use admin switched to db admin

3. Use db.getUsers() to list existing users (see https://docs.mongodb.com/v3.4/reference/method/db.getUsers/)

   No Format
   > db.getUsers() [ { "_id" : "admin.bvq", "user" : "bvq", "db" : "admin", "roles" : [ { "role" : "root", "db" : "admin" } ] } ]

   See https://docs.mongodb.com/v3.4/core/security-built-in-roles/ for available roles in MongoDB

Create

...

a user

1. Establish a connection to MongoDB via mongo CLI (see Connect to MongoDB with mongo CLI)
   
   
2. Switch to admin db with use admin
   
   

3. Use db.createUser() to create a new user (see https://docs.mongodb.com/v3.4/reference/method/db.createUser/)

   No Format
   > db.createUser({user: 'TEST_USER', pwd: 'TEST_PASSWORD', customData: { name: 'NAME OF TESTUSER' }, roles: ['readWriteAnyDatabase']}) Successfully added user: { "user" : "TEST_USER", "customData" : { "name" : "NAME OF TESTUSER" }, "roles" : [ "readWriteAnyDatabase" ] } >

4. List users with db.getUsers() (see List existing users)

   No Format
   > db.getUsers() [ { "_id" : "admin.TEST_USER", "user" : "TEST_USER", "db" : "admin", "customData" : { "name" : "NAME OF TESTUSER" }, "roles" : [ { "role" : "readWriteAnyDatabase", "db" : "admin" } ] }, { "_id" : "admin.bvq", "user" : "bvq", "db" : "admin", "roles" : [ { "role" : "root", "db" : "admin" } ] } ] >

Remove

...

a user

1. Establish a connection to MongoDB via mongo CLI (see Connect to MongoDB with mongo CLI)
   
   

2. Switch to admin db with use admin
   
   

3. Use db.dropUser() to delete an existing user (see https://docs.mongodb.com/v3.4/reference/method/db.dropUser/)

   No Format
   > db.dropUser('TEST_USER') true >

4. List users with db.getUsers() (see List existing users)

   No Format
   > db.getUsers() [ { "_id" : "admin.bvq", "user" : "bvq", "db" : "admin", "roles" : [ { "role" : "root", "db" : "admin" } ] } ] >

   User TEST_USER was deleted successfully (user was created in Create an additional user)