Retrieving all tokens
GET /asg/oauth2/access_token/owners HTTP/1.1 Authorization: Basic czZCaGRSa3F0MzpnWDFmQmF0M2JW Host: server.example.com
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GET /asg/oauth2/access_token/owners HTTP/1.1 Authorization: Basic czZCaGRSa3F0MzpnWDFmQmF0M2JW Host: server.example.com