db.createUser()
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Definition
db.createUser(user, writeConcern)
Creates a new user for the database on which the method is run.
db.createUser()
returns a duplicate user error if the user already exists on the database.Important
mongosh Method
This page documents a
mongosh
method. This is not the documentation for database commands or language-specific drivers, such as Node.js.For the database command, see the
createUser
command.For MongoDB API drivers, refer to the language-specific MongoDB driver documentation.
For the legacy
mongo
shell documentation, refer to the documentation for the corresponding MongoDB Server release:The
db.createUser()
method has the following syntax:FieldTypeDescriptionuser
documentThe document with authentication and access information about the user to create.writeConcern
documentOptional. The level of write concern for the operation. See Write Concern Specification.
The
user
document defines the user and has the following form:Tip
Starting in version 4.2 of the
mongo
shell, you can use thepasswordPrompt()
method in conjunction with various user authentication/management methods/commands to prompt for the password instead of specifying the password directly in the method/command call. However, you can still specify the password directly as you would with earlier versions of themongo
shell.{ user: "<name>", pwd: passwordPrompt(), // Or "<cleartext password>" customData: { <any information> }, roles: [ { role: "<role>", db: "<database>" } | "<role>", ... ], authenticationRestrictions: [ { clientSource: ["<IP>" | "<CIDR range>", ...], serverAddress: ["<IP>" | "<CIDR range>", ...] }, ... ], mechanisms: [ "<SCRAM-SHA-1|SCRAM-SHA-256>", ... ], passwordDigestor: "<server|client>" } The
user
document has the following fields:FieldTypeDescriptionuser
stringThe name of the new user.pwd
stringThe user's password. The
pwd
field is not required if you rundb.createUser()
on the$external
database to create users who have credentials stored externally to MongoDB.The value can be either:
the user's password in cleartext string, or
passwordPrompt()
to prompt for the user's password.
Tip
Starting in version 4.2 of the
mongo
shell, you can use thepasswordPrompt()
method in conjunction with various user authentication/management methods/commands to prompt for the password instead of specifying the password directly in the method/command call. However, you can still specify the password directly as you would with earlier versions of themongo
shell.customData
documentOptional. Any arbitrary information. This field can be used to store any data an admin wishes to associate with this particular user. For example, this could be the user's full name or employee id.roles
arrayThe roles granted to the user. Can specify an empty array[]
to create users without roles.arrayOptional. The authentication restrictions the server enforces on the created user. Specifies a list of IP addresses and CIDR ranges from which the user is allowed to connect to the server or from which the server can accept users.
mechanisms
arrayOptional. Specify the specific SCRAM mechanism or mechanisms for creating SCRAM user credentials. If
authenticationMechanisms
is specified, you can only specify a subset of theauthenticationMechanisms
.Valid values are:
"SCRAM-SHA-1"
Uses the
SHA-1
hashing function.
"SCRAM-SHA-256"
Uses the
SHA-256
hashing function.Requires passwordDigestor to be
server
.
The default is both
SCRAM-SHA-1
andSCRAM-SHA-256
.passwordDigestor
stringOptional. Indicates whether the server or the client digests the password.
Available values are:
"server"
(Default)- The server receives undigested password from the client and digests the password.
"client"
(Not compatible withSCRAM-SHA-256
)- The client digests the password and passes the digested password to the server.
Roles
In the roles
field, you can specify both
built-in roles and user-defined
roles.
To specify a role that exists in the same database where
db.createUser()
runs, you can either specify the role with the name of
the role:
"readWrite"
Or you can specify the role with a document, as in:
{ role: "<role>", db: "<database>" }
To specify a role that exists in a different database, specify the role with a document.
Authentication Restrictions
The authenticationRestrictions
document can contain only the
following fields. The server throws an error if the
authenticationRestrictions
document contains an unrecognized field:
Field Name | Value | Description |
---|---|---|
clientSource | Array of IP addresses and/or
CIDR ranges | If present, when authenticating a user, the server verifies
that the client's IP address is either in the given list or
belongs to a CIDR range in the list. If the client's IP address
is not present, the server does not authenticate the user. |
serverAddress | Array of IP addresses and/or
CIDR ranges | A list of IP addresses or CIDR ranges to which the client can
connect. If present, the server will verify that the client's
connection was accepted via an IP address in the given list. If
the connection was accepted via an unrecognized IP address, the
server does not authenticate the user. |
Important
If a user inherits multiple roles with incompatible authentication restrictions, that user becomes unusable.
For example, if a user inherits one role in which the
clientSource
field is ["198.51.100.0"]
and another role in
which the clientSource
field is ["203.0.113.0"]
the server is
unable to authenticate the user.
For more information on authentication in MongoDB, see Authentication.
The db.createUser()
method wraps the createUser
command.
Behavior
User ID
Starting in version 4.0.9, MongoDB automatically assigns a unique
userId
to the user upon creation.
Replica set
If run on a replica set, db.createUser()
is executed using
"majority"
write concern by default.
Encryption
Warning
By default, db.createUser()
sends all specified data to the MongoDB
instance in cleartext, even if using passwordPrompt()
. Use
TLS transport encryption to protect communications between clients
and the server, including the password sent by db.createUser()
. For
instructions on enabling TLS transport encryption, see
Configure mongod
and mongos
for TLS/SSL.
MongoDB does not store the password in cleartext. The password is only vulnerable in transit between the client and the server, and only if TLS transport encryption is not enabled.
External Credentials
Users created on the $external
database should have credentials
stored externally to MongoDB, as, for example, with MongoDB
Enterprise installations that use Kerberos.
To use Client Sessions and Causal Consistency Guarantees with $external
authentication users
(Kerberos, LDAP, or x.509 users), usernames cannot be greater
than 10k bytes.
local
Database
You cannot create users on the local database.
Required Access
To create a new user in a database, you must have the
createUser
action on that database resource.To grant roles to a user, you must have the
grantRole
action on the role's database.
The userAdmin
and
userAdminAnyDatabase
built-in roles provide
createUser
and grantRole
actions on their
respective resources.
Examples
The following db.createUser()
operation creates the
accountAdmin01
user on the products
database.
Tip
Starting in version 4.2 of the mongo
shell, you can
use the passwordPrompt()
method in conjunction with
various user authentication/management methods/commands to prompt
for the password instead of specifying the password directly in the
method/command call. However, you can still specify the password
directly as you would with earlier versions of the
mongo
shell.
use products db.createUser( { user: "accountAdmin01", pwd: passwordPrompt(), // Or "<cleartext password>" customData: { employeeId: 12345 }, roles: [ { role: "clusterAdmin", db: "admin" }, { role: "readAnyDatabase", db: "admin" }, "readWrite"] }, { w: "majority" , wtimeout: 5000 } )
The operation gives accountAdmin01
the following roles:
the
clusterAdmin
andreadAnyDatabase
roles on theadmin
databasethe
readWrite
role on theproducts
database
Create User with Roles
The following operation creates accountUser
in the products
database
and gives the user the readWrite
and dbAdmin
roles.
Tip
Starting in version 4.2 of the mongo
shell, you can
use the passwordPrompt()
method in conjunction with
various user authentication/management methods/commands to prompt
for the password instead of specifying the password directly in the
method/command call. However, you can still specify the password
directly as you would with earlier versions of the
mongo
shell.
use products db.createUser( { user: "accountUser", pwd: passwordPrompt(), // Or "<cleartext password>" roles: [ "readWrite", "dbAdmin" ] } )
Create User without Roles
The following operation creates a user named reportsUser
in the admin
database but does not yet assign roles:
Tip
Starting in version 4.2 of the mongo
shell, you can
use the passwordPrompt()
method in conjunction with
various user authentication/management methods/commands to prompt
for the password instead of specifying the password directly in the
method/command call. However, you can still specify the password
directly as you would with earlier versions of the
mongo
shell.
use admin db.createUser( { user: "reportsUser", pwd: passwordPrompt(), // Or "<cleartext password>" roles: [ ] } )
Create Administrative User with Roles
The following operation creates a user named appAdmin
in the
admin
database and gives the user readWrite
access to the
config
database, which lets the user change certain settings for
sharded clusters, such as to the balancer setting.
Tip
Starting in version 4.2 of the mongo
shell, you can
use the passwordPrompt()
method in conjunction with
various user authentication/management methods/commands to prompt
for the password instead of specifying the password directly in the
method/command call. However, you can still specify the password
directly as you would with earlier versions of the
mongo
shell.
use admin db.createUser( { user: "appAdmin", pwd: passwordPrompt(), // Or "<cleartext password>" roles: [ { role: "readWrite", db: "config" }, "clusterAdmin" ] } )
Create User with Authentication Restrictions
The following operation creates a user named restricted
in the
admin
database. This user may only authenticate if connecting from
IP address 192.0.2.0
to IP address 198.51.100.0
.
Tip
Starting in version 4.2 of the mongo
shell, you can
use the passwordPrompt()
method in conjunction with
various user authentication/management methods/commands to prompt
for the password instead of specifying the password directly in the
method/command call. However, you can still specify the password
directly as you would with earlier versions of the
mongo
shell.
use admin db.createUser( { user: "restricted", pwd: passwordPrompt(), // Or "<cleartext password>" roles: [ { role: "readWrite", db: "reporting" } ], authenticationRestrictions: [ { clientSource: ["192.0.2.0"], serverAddress: ["198.51.100.0"] } ] } )
Create User with SCRAM-SHA-256
Credentials Only
Note
To use SCRAM-SHA-256, the
featureCompatibilityVersion
must be set to 4.0
. For more
information on featureCompatibilityVersion, see Get FeatureCompatibilityVersion and
setFeatureCompatibilityVersion
.
The following operation creates a user with only SCRAM-SHA-256
credentials.
Tip
Starting in version 4.2 of the mongo
shell, you can
use the passwordPrompt()
method in conjunction with
various user authentication/management methods/commands to prompt
for the password instead of specifying the password directly in the
method/command call. However, you can still specify the password
directly as you would with earlier versions of the
mongo
shell.
use reporting db.createUser( { user: "reportUser256", pwd: passwordPrompt(), // Or "<cleartext password>" roles: [ { role: "readWrite", db: "reporting" } ], mechanisms: [ "SCRAM-SHA-256" ] } )
If the authenticationMechanisms
parameter is set, the
mechanisms
field can only include values specified in the
authenticationMechanisms
parameter.