diff --git a/oneloginoidc/src/main/java/com/onelogin/oidc/userInfo/UserInfo.kt b/oneloginoidc/src/main/java/com/onelogin/oidc/userInfo/UserInfo.kt
index 787dd9d..08e6c7c 100644
--- a/oneloginoidc/src/main/java/com/onelogin/oidc/userInfo/UserInfo.kt
+++ b/oneloginoidc/src/main/java/com/onelogin/oidc/userInfo/UserInfo.kt
@@ -1,12 +1,21 @@
 package com.onelogin.oidc.userInfo
 
+import com.google.gson.Gson
+import com.google.gson.annotations.SerializedName
+
 data class UserInfo(
     val sub: String,
     val email: String,
-    val preferredUsername: String?,
+    @SerializedName("preferred_username")  val preferredUsername: String?,
     val name: String?,
-    val updatedAt: String?,
-    val givenName: String?,
-    val familyName: String?,
+    @SerializedName("updated_at") val updatedAt: String?,
+    @SerializedName("given_name") val givenName: String?,
+    @SerializedName("family_name") val familyName: String?,
     val groups: List<String>?
-)
+) : JSONConvertable
+
+interface JSONConvertable {
+    fun toJSON(): String = Gson().toJson(this)
+}
+
+inline fun <reified T: JSONConvertable> String.toObject(): T = Gson().fromJson(this, T::class.java)