adding authentication header

[Nitin Verma]

I am using this API in my android app and i am facing problem adding api key in header of request.I am using retrofit and by using OkHttpClient, i have added interceptor and then added header but i am getting null response.

In API documentation,it is written that we have to add this header: Authorization: ApiKey userName:key

same request works on postman.

please help..

[Aleksey Ropan]

You can write to me telegram @aropan.