token.go
func AccessTokenFromContext(ctx context.Context) (string, bool) {
	at, ok := ctx.Value(accessTokenContextKey).(string)

	return at, ok
}
func AccessTokenFromContext(ctx context.Context) (string, bool) {
	at, ok := ctx.Value(accessTokenContextKey).(string)

	return at, ok
}
// AccessTokenFromContext returns the token value stored in context, if any.