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cdcm-client: Used for elm-sync to CDCM server-to-server interactions
custom: used for user access to CDCM for to specify the user who will be able to access elm-sync development and unit testing. This entry may not be needed in customer configurations, but is retained for completenessand do mapping repair operations.
For each client.registration, there is a corresponding client.provider that configures the authentication provider and method for that client.registration.
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