asyncapi-3-channel-no-empty-parameter

asyncapi-3-channel-no-empty-parameter checks channel addresses for empty {} placeholders. Empty placeholders cannot be matched to a named channel parameter.

Why did this violation appear?

A channel address contains {} instead of a named parameter like {userId}.

Bad example

asyncapi: 3.1.0
channels:
  userEvents:
    address: users/{}/events

Good example

asyncapi: 3.1.0
channels:
  userEvents:
    address: users/{userId}/events
    parameters:
      userId:
        description: User identifier.

How do I fix this violation?

Name every placeholder and define a matching parameter for it on the channel.