Error validateTokenPath of undefined on Ionic 3

[piotrpietrusewicz]

Hi,
I have error

cannnot read property 'validateTokenPath' of undefined.

Stack

• Ionic 3.9.2

• Angular 5.2.9

• angular2-token

I have this.auth.init({ validateTokenAuth: 'PATH' }) and still throw error.
Do you have any suggestions what am I doing wrong ? Maybe incompatibility stack versions with angular2-token package ?

THX.