Creates an index for a data collection.
The index can't be used immediately, as the process of generating the index takes time.
You can check whether your index is ready using listIndexes().
Note that when an index fails to create, the failed index still occupies a slot.
To remove the failed index and free up the slot for a new index, use dropIndex().
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the data collection for which to generate the index.
Details of the index to be created.