Do Refresh() by querying user's profile data.
Since LinkedIn doesn't provide refresh tokens at all, and the access
tokens have 60 days expiration, refresh tokens issued by Dex will fail
to update after 60 days.
Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
connector/linkedin implements authorization strategy via LinkedIn's
OAuth2 endpoint + profile API.
It doesn't implement RefreshConnector as LinkedIn doesn't provide any
refresh token at all (https://developer.linkedin.com/docs/oauth2, Step 5
— Refresh your Access Tokens) and recommends ordinary AuthCode exchange
flow when token refresh is required.
Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
