How to create a custom validation attribute in asp.net core. Text version of the video ...

#asp.net core custom data in aspnetusers table  #asp.net core custom identityuser  #asp.net core extend identityuser  #asp.net core 2.1 extend identityuser  #extend identityuser asp.net core 2.2  #how to extend asp.net core identity user  #asp.net core aspnetusers table  #storing additional custom data in aspnetusers table  #how to store custom data in aspnetusers table  #asp.net core mvc extend identityuser  #asp.net core extend identityuser add migration not working