https://api.sciener.com/oauth2/token
Use the refresh_token to get new access token and refresh token POST JSON

Name	Required	Value	Description
client_id	Y		The app_id which is assigned by system when you create an application
client_secret	Y		The app_secret which is assigned by system when you create an application
grant_type	Y	refresh_token
refresh_token	Y		Refresh token

Name	Type	Example	Description
access_token	String	Y	Access token
expires_in	Int	10	Expire time of access token, in second.
scope	String	user,key,room	Permission scope
refresh_token	String	f45a713ef706d09c892084ee7e350384	Refresh token