Issue with fetching real time LinkedIn Company Updates -

i trying fetch linkedin company updates endpoint: https://api.linkedin.com/v1/companies/{id}/updates?format=json. mentioned in documentation here, need additional permission(scope) fetch company updates i.e: rw_company_admin. so, have created app , set required permission. current implementation, on each request endpoint, requires manually log in linkedin using admin credentials of our company page.

but automate process. can please guide me way can automate authorization process , able fetch company updates on cron run? want implement real time linkedin feed on our site.