DefaultErrorMapper returns *HttpError.

WithRequestData takes either a struct instance, map, string, bytes, or io.Reader and sends it either as query string for GET and DELETE calls, or as request body for POST, PUT, and PATCH calls.

WithRequestHeader adds a request visitor, that sets a header on a request.

WithRequestHeaders adds a request visitor, that set all headers from a map.

WithRequestVisitor applies given function on a request.

WithResponseUnmarshal unmarshals the response body into response.

WithToken uses the specified golang.org/x/oauth2 token on a request.

WithTokenSource uses the specified golang.org/x/oauth2 token source on a request.

WithUrlEncodedData takes either a struct instance, map, string, bytes, or io.Reader plus a content type, and sends it either as query string for GET and DELETE calls, or as request body for POST, PUT, and PATCH calls.

GetOAuthTokenRequest is the request to get an OAuth token.