handler/oauth2: set expiration time before the access token is generated (#216)
handler/oauth2: set expiration time before the access token is generated (#216)

Signed-off-by: Nikita Vorobey <7afaa0a74c41394c7122fe61723ddc365f322a55@vorobey.by>
ory/fosite,ory-am/fosite,ory/fosite,ory-am/fosite