Returns an Integration object if a valid identifier was provided.
The following are the examples of HTTP status codes including errors that API can generate
|Response codes||Response content||Description|
|200 OK||An integration object||An integration has been retrieved successfully.|
|400 Bad Request||Parameter is empty||The parameter "key" cannot be empty.|
|403 Forbidden||Access denied||Access to the integration is denied.|
|404 Not Found||Object not found||An integration with the specified key wasn't found.|