Terraform playbook failed

[sathe06]

Hi,

I am re-using this code as it is.
i am getting this error.

terraform plan

│ Error: Call to unknown function
│
│   on main.tf line 7, in locals:
│    7:   mysqlserver_settings = defaults(var.mariadb_settings, {
│    8:     charset   = "utf8"
│    9:     collation = "utf8_general_ci"
│   10:   })
│     ├────────────────
│     │ var.mariadb_settings is a object
│
│ There is no function named "defaults".

Can you please suggest how to solve this
@kumarvna