Retrofit2 post request is successful but I'm not able to retrieve token from response body - rest

Question

So I'm trying to making a login(post) request to an API (https://reqres.in/api/login) with retrofit 2. The connection was successful as the response code is 200, when I did the same on Postman I received a response which contains a token string which I want but in android studio when I log the response body it gives different output. I am new to kotlin so I think I must be doing something wrong while retrieving response.
Output I'm receiving:
Response{protocol=h2, code=200, message=, url=https://reqres.in/api/login}
Output I want (token field)
{
"token": "QpwL5tke4Pnpja7X4"
}
Retrofit Builder
val retrofit = Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(apiUrl)
.build()
val api : reqresAPI = retrofit.create(reqresAPI::class.java)
API Interface
interface reqresAPI {
// FOR REFERENCE
// https://reqres.in/api/login
// ANNOTATE WITH POST TO SEND DATA
#POST(value = "login")
fun sendData(
#Body user: User
): Call<ResponseModel> // CALL IS USED TO MAKE AN API CALL
}
Response Model
class ResponseModel{
val token : String = ""
get() = field
}
User model with 2 parameters email and password
class User (
val email :String,
val password :String
)
Calling API
val call = api.sendData(user)
call.enqueue(object : Callback<ResponseModel>{
override fun onResponse(call: Call<ResponseModel>, response: Response<ResponseModel>) {
Log.d("LOGGER", response.toString())
}
override fun onFailure(call: Call<ResponseModel>, t: Throwable) {
Log.d("LOGGER", "ERROR "+t.message.toString())
}
})

Answer 1

Please change this
class ResponseModel{
val token : String = ""
get() = field
}
to this
class ResponseModel{
#SerializedName("token")
val token : String
}