<when i try to retrieve data and after i successfu...

# stackoverflow

[user]

when i try to retrieve data and after i successfully log in i end up getting 401 error and the error message is always please log in again
this is my API call interface
interface DataAPI {
val data:Data
@FormUrlEncoded
@POST("get-sessions")
fun getSessionsList(
@Field("session_type") session_type :Int = data.session_type
): Call

}
and my retrofit class
object DataRetrofit {
private val authenticationInterceptor = HttpLoggingInterceptor()
fun instance(): DataAPI {
authenticationInterceptor.level = HttpLoggingInterceptor.Level.BODY
val client =...