[api] Set correct content-type for OAuth responses
[api] Set correct content-type for OAuth responses

GNOME/snowy,jaredjennings/snowy,GNOME/snowy,jaredjennings/snowy,syskill/snowy,jaredjennings/snowy,widox/snowy,jaredjennings/snowy,syskill/snowy,leonhandreke/snowy,leonhandreke/snowy,widox/snowy