Since the Config gem doesn't support arrays in environment variable, Settings.auth.configuration needs special handling, requires a key for every entry needs to have a key, eg, e.g.: SETTINGS__AUTH__CONFIGURATION__IU__NAME=Indiana University
SETTINGS__AUTH__CONFIGURATION__IU__PROVIDER=cas
SETTINGS__AUTH__CONFIGURATION__IU__PARAMS__CLIENT_ID=client_id_value
SETTINGS__AUTH__CONFIGURATION__IU__PARAMS__CLIENT_SECRET=client_secret_value
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