Client method for returning the configuration information and metadata of the specified user pool app client.
See https://www.paws-r-sdk.com/docs/cognitoidentityprovider_describe_user_pool_client/ for full documentation.
cognitoidentityprovider_describe_user_pool_client(UserPoolId, ClientId)
[required] The user pool ID for the user pool you want to describe.
[required] The app client ID of the app associated with the user pool.