Error: `subscription` root operation type is not defined
   ╭─[ 0014_subscription_operation_without_subscription_schema_operation_type.graphql:1:1 ]
   │
 1 │ ╭─▶ subscription messageSubscription {
   ┆ ┆   
 6 │ ├─▶ }
   │ │       
   │ ╰─────── `subscription` is not defined in the schema and is therefore not supported
   │     
   │     Help: consider defining a `subscription` root operation type in your schema
───╯

