Revert filters usage and add Tokens.GetValidToken

Breaking Changes 💥

• Found out that the filter types weren't being enforced unless inlined, essentially rendering the feature useless. Reverting to the way filter used to work previously where the keys are the properties to filter on (dot referenced string for nested xp values)

New Feature ✨

• Added Tokens.GetValidToken. If the token exists and is valid, it will return it. If it doesn't exist or is invalid it will attempt to refresh the token and return that.