[chef] error in call chef-server REST api

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Hi,

I have to know how to Managing API Clients through the Server API  in REST
client tool,  I don’t know how to request must be signed using
Mixlib::Authentication. how to generate and use this parameters 'X_OPS_SIGN',
'X_OPS_USERID', 'X_OPS_TIMESTAMP', 'X_OPS_CONTENT_HASH' can u send any 
solution
as soon as possible.


Thanks and Regards,
Ganesan.A