MongoDB create user

createUser

use admin

db.createUser(
  {
    user: "admin",
    pwd: "pass",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)

use anotherDB

db.createUser(
  {
    user: "api",
    pwd: "apipass",
    roles: [ { role: "readWrite", db: "anotherDB" },
             { role: "readWrite", db: "anotherDB2" } ]
  }
)

// login with user info.
mongo --host <ip> --port 27017 -u <username> -p <password> --authenticationDatabase <dbname>