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Default user when connecting remotely. Usually, an untrusted user with few privileges.
admin
1
Default user when using Tarantool as a console. Usually, an :ref:`administrative user <authentication-owners_privileges>` with all privileges.
public
2
role
Pre-defined :ref:`role <authentication-roles>`, automatically granted to new users when they are created with ``box.schema.user.create(user-name)``. Therefore a convenient way to grant 'read' on space 't' to every user that will ever exist is with ``box.schema.role.grant('public','read','space','t')``.
replication
3
Pre-defined :ref:`role <authentication-roles>`, which the 'admin' user can grant to users who need to use :ref:`replication <replication>` features.
super
31
Pre-defined :ref:`role <authentication-roles>`, which the 'admin' user can grant to users who need all privileges on all objects. The 'super' role has these privileges on 'universe': read, write, execute, create, drop, alter.
To select a tuple from the ``_user`` space, use ``box.space._user:select()``. In the example below, ``select`` is executed for a user with id = 0. This is the 'guest' user that has no password.
tarantool> box.space._user:select{0}
---
- - [0, 1, 'guest', 'user']
...
To change tuples in the ``_user`` space, do not use ordinary ``box.space`` functions for insert, update, or delete. The ``_user`` space is special, so there are special functions that have appropriate error checking.\
To create a new user, use :doc:`/reference/reference_lua/box_schema/user_create`:
box.schema.user.create(*user-name*)
box.schema.user.create(*user-name*, {if_not_exists = true})
box.schema.user.create(*user-name*, {password = *password*})
To change the user's password, use :doc:`/reference/reference_lua/box_schema/user_passwd`:
-- To change the current user's password
box.schema.user.passwd(*password*)

-- To change a different user's password
-- (usually only 'admin' can do it)
box.schema.user.passwd(*user-name*, *password*)
To drop a user, use :doc:`/reference/reference_lua/box_schema/user_drop`:
box.schema.user.drop(*user-name*)
To check whether a user exists, use :doc:`/reference/reference_lua/box_schema/user_exists`, which returns ``true`` or ``false``:
box.schema.user.exists(*user-name*)
To find what privileges a user has, use :doc:`/reference/reference_lua/box_schema/user_info`:
box.schema.user.info(*user-name*)
The maximum number of users is 32.
**Example:**
Here is a session which creates a new user with a strong password, selects a tuple in the ``_user`` space, and then drops the user.
tarantool> box.schema.user.create('JeanMartin', {password = 'Iwtso_6_os$$'})
---
...
tarantool> box.space._user.index.name:select{'JeanMartin'}
---
- - [17, 1, 'JeanMartin', 'user', {'chap-sha1': 't3xjUpQdrt857O+YRvGbMY5py8Q='}]
...
tarantool> box.schema.user.drop('JeanMartin')
---
...

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testing_project / Documentation: reference/reference_lua/box_space/_user — English

tarantool> box.space._user:select{0}
---
- - [0, 1, 'guest', 'user']
...
a year ago
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