import android.support.annotation.Keep;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
import org.parceler.Parcel;

@Parcel @Keep
public class LoginRequest {

static Gson gson = new GsonBuilder().setPrettyPrinting().create();

@SerializedName("username")
@Expose
String username;
@SerializedName("password")
@Expose
String password;

public LoginRequest(){

}

/**
 *
 * @return
 * The username
 */
public String getUsername() {
    return username;
}

/**
 *
 * @param username
 * The username
 */
public void setUsername(String username) {
    this.username = username;
}

/**
 *
 * @return
 * The password
 */
public String getPassword() {
    return password;
}

/**
 *
 * @param password
 * The password
 */
public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return gson.toJson(this);
}
}

-keep class com.google.gson.** { *; }

# Classes that will be serialized/deserialized over Gson
 -keep class com.myclass.data.model.** { *; }

@SerializedName("username")
@Expose
@Keep
String username;
@SerializedName("password")
@Expose
@Keep
String password;