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How to create MongoDB user on existing database with correct role?
To create a new user in MongoDB, use createUser(). Following is the query −
> db.createUser( ... { ... user: "John", ... pwd: "123456", ... roles: [ { role: "readWrite", db: "test" } ], ... mechanisms: [ "SCRAM-SHA-256" ] ... } ... )
This will produce the following output −
Successfully added user: { "user" : "John", "roles" : [ { "role" : "readWrite", "db" : "test" } ], "mechanisms" : [ "SCRAM-SHA-256" ] }
Following is the query to show all users −
> db.getUsers();
This will produce the following output −
[ { "_id" : "test.John", "user" : "John", "db" : "test", "roles" : [ { "role" : "readWrite", "db" : "test" } ], "mechanisms" : [ "SCRAM-SHA-256" ] } ]
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