Adds all custom claims to the asp.net core identity

AddAllClaimAction.cs

    public class AddAllClaimAction : ClaimAction
    {
        public AddAllClaimAction() : base(null, null)
        {
        }

        public override void Run(JObject userData, ClaimsIdentity identity, string issuer)
        {
            var claims = userData.Properties()
                .Where(x => !x.Value.HasValues)
                .Select(x => new Claim(x.Name, x.Value.Value<string>(), null, issuer))
                .ToList();

            var nonDuplicateClaims = claims.Where(x => !identity.HasClaim(x.Type, x.Value));

            identity.AddClaims(nonDuplicateClaims);
        }
    }

startup.cs

// Usage (inside startup.cs)

services.AddAuthentication()
    .AddOpenIdConnect("oidc", options =>
    {
        // ...
        options.ClaimActions.Add(new AddAllClaimAction());
        // ...
    }