arangodb/Documentation/Books/Manual/getting-started-authentication.md

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default	ArangoDB allows to restrict access to databases to certain users

Authentication

ArangoDB allows to restrict access to databases to certain users. All users of the system database are considered administrators. During installation a default user root is created, which has access to all databases.

You should create a database for your application together with a user that has access rights to this database. See Managing Users.

Use the arangosh to create a new database and user.

arangosh> db._createDatabase("example");
arangosh> var users = require("@arangodb/users");
arangosh> users.save("root@example", "password");
arangosh> users.grantDatabase("root@example", "example");

You can now connect to the new database using the user root@example.

shell> arangosh --server.username "root@example" --server.database example