Refresh token variant

Description	Exchanges a refresh token for a new access token.
Endpoint	/oauth/token
Method	POST

Parameters

Name	Description	Required
grant_type	Must be "refresh_token" to emphasize that you are trying to exchange a refresh token.
client_id	The client id given during the client registration. Alternatively this can be supplied using the Basic HTTP header with the client_id as username and client_secret as password.
client_secret	The client secret given during the client registration. Alternatively this can be supplied using the Basic HTTP header with the client_id as username and client_secret as password.
refresh_token	The refresh token from the access token to refresh.