Interceptor with Authorization header and asynchronously obtained access token

auth_interceptor_with_async_access_token.kt

import kotlinx.coroutines.runBlocking
import okhttp3.Interceptor
import okhttp3.Response
class AuthInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val accessToken = runBlocking { obtainAccessToken() }

        val request = chain.request()
        val newRequest = request.newBuilder()
            .addHeader("Authorization", accessToken)
            .build()
        return chain.proceed(newRequest)
    }
}