Changes to Retrieve Campaigns

added the optional property data/items/relationships/custom_feed/oneOf[#/components/schemas/CustomFeedV1]/relationships/connected_list to the response with the 200 status

added the optional property errors/items/source to the response with the 400 status

added the optional property errors/items/source to the response with the 401 status

added the optional property errors/items/source to the response with the 403 status

added the optional property errors/items/source to the response with the 429 status

added the optional property errors/items/source to the response with the 500 status

added the optional property errors/items/source to the response with the 504 status

response property data/items/attributes/total_budget list-of-types was widened by adding types null to media type application/json of response 200

endpoint added