**To update a user** The following ``update-user`` modifies a user's access string. :: aws memorydb update-user \ --user-name my-user \ --access-string "off ~objects:* ~items:* ~public:* resetchannels -@all" Output:: { "User": { "Name": "my-user", "Status": "modifying", "AccessString": "off ~objects:* ~items:* ~public:* resetchannels -@all", "ACLNames": [ "myt-acl" ], "MinimumEngineVersion": "6.2", "Authentication": { "Type": "password", "PasswordCount": 2 }, "ARN": "arn:aws:memorydb:us-east-1:491658xxxxxx:user/my-user" } } For more information, see `Authenticating users with Access Control Lists <https://docs.aws.amazon.com/memorydb/latest/devguide/clusters.acls.html>`__ in the *MemoryDB User Guide*.