curl --request GET \
--url https://api.decodahealth.com/user/patient/external-id-exists/{external_id} \
--header 'API-KEY: <api-key>' \
--header 'TENANT: <tenant>'truecurl --request GET \
--url https://api.decodahealth.com/user/patient/external-id-exists/{external_id} \
--header 'API-KEY: <api-key>' \
--header 'TENANT: <tenant>'true