For Redis engine version 6.x onwards: Creates a Redis user. For more information, see Using Role Based Access Control (RBAC).
elasticache_create_user(UserId, UserName, Engine, Passwords,
AccessString, NoPasswordRequired)
[required] The ID of the user.
[required] The username of the user.
[required] The current supported value is Redis.
Passwords used for this user. You can create up to two passwords for each user.
[required] Access permissions string used for this user.
Indicates a password is not required for this user.
svc$create_user( UserId = "string", UserName = "string", Engine = "string", Passwords = list( "string" ), AccessString = "string", NoPasswordRequired = TRUE|FALSE )