fix problem with verification of initial OAuth requests which lack a resource_owner token
fix problem with verification of initial OAuth requests which lack a resource_owner token

oauthlib/oauthlib,lepture/oauthlib,garciasolero/oauthlib,flamusdiu/oauthlib,hirokiky/oauthlib,lepture/oauthlib,masci/oauthlib,singingwolfboy/oauthlib,idan/oauthlib,skion/oauthlib-oidc,cyrilchaponeverysens/oauthlib,mick88/oauthlib,armersong/oauthlib,metatoaster/oauthlib,barseghyanartur/oauthlib,Blitzen/oauthlib,flamusdiu/oauthlib,bjmc/oauthlib,masci/oauthlib