The documentation portal is undergoing maintenance. During this period, you can't create any new user credentials. If you do, you'll need to recreate the user credential after the maintenance period ends.
Effective in version 10.2.1, you can use the Enterprise Data Lake application to add and delete Enterprise Data Catalog resources. Catalog resources represent the external data sources and metadata repositories from which scanners extract metadata that can be used in the data lake.
For more information, see the "Managing the Data Lake" chapter in the
Informatica 10.2.1 Enterprise Data Lake Administrator Guide