List of the card relation's information.
|Field : Object||Description|
|cards: [Card]||Lookup the connected cards by their identifier.|
|name: String||Represents the chosen name of the relation.|
|pipe: Pipe||Lookup the connected pipe by its identifier.|
|repo: RepoTypes||Lookup the connected Pipe or Table.|
|source_type: String||Represents if the connection is through a PipeRelation or a Connection Field. The possible values are: - PipeRelation - Field|