Optional server whitelists (#5979)

Content.Server.Database/Model.cs

@@ -36,6 +36,7 @@ namespace Content.Server.Database
         public DbSet<Round> Round { get; set; } = null!;
         public DbSet<AdminLog> AdminLog { get; set; } = null!;
         public DbSet<AdminLogPlayer> AdminLogPlayer { get; set; } = null!;
+        public DbSet<Whitelist> Whitelist { get; set; } = null!;
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
@@ -205,6 +206,12 @@ namespace Content.Server.Database
         public List<AdminLogPlayer> AdminLogs { get; set; } = null!;
     }
 
+    [Table("whitelist")]
+    public class Whitelist
+    {
+        [Required, Key] public Guid UserId { get; set; }
+    }
+
     public class Admin
     {
         [Key] public Guid UserId { get; set; }