Created Refreh Token handler factory
Extended AccessToken to store its expiration date
Implemented RefreshTokenHandler::process
First implementation of reading params of refresh token
Created method to fetch a refresh token
Added compare method to scope handler
Created AccessTokenNotFound error
Read and validate input of refresh token request
Save refresh token with an access token
Pass additional data to generated access token
Create access token data in token generators
Letting token generator create access token
Return a refresh token in auth code grant and ROPC grant
Fixed reading type from wrong source
Fixed instantiating scope handler
Extended concrete stores to use refresh token
Use refresh token in dev box
Check if a refresh token has expired before issuing a new access token
Define token expiration time in devbox
Use a better name for var