userprofile.kt

data class UserProfile(var uId: String,
                       @ServerTimestamp
                       var createdAt: Date?=null,
                       @ServerTimestamp
                       var updatedAt: Date?=null,
                       var image: String="", 
                       @get:PropertyName("user_name")
                       @set:PropertyName("user_name")
                       var userName: String="",
                       var token :String="",
                       var mobile: MobileNumber?=null)

data class MobileNumber(
   @get:PropertyName("country_code")
   @set:PropertyName("country_code")
   var countryCode: String="", 
   var number: String="")