pub fn decoder() -> fn(Dynamic) ->
  Result(AccessToken, List(DecodeError))

pub fn is_expired(access_token: AccessToken) -> Bool

pub fn needs_validated(access_token: AccessToken) -> Bool

pub fn new_user_access_token(
  expires_in: Int,
  obtained_at: Int,
  refresh_token: String,
  scopes: List(Scope),
  token: String,
  last_validated_at: Option(Int),
) -> AccessToken

pub fn refresh_token(
  access_token: AccessToken,
) -> Result(String, TwitchError)

pub fn scopes(
  access_token: AccessToken,
) -> Result(List(Scope), TwitchError)

pub fn set_expires_in(
  access_token: AccessToken,
  expires_in: Int,
) -> AccessToken

pub fn token(access_token: AccessToken) -> String