Finished database management and user authentication

HopFrame.Database/Models/Entries/TokenEntry.cs

@@ -0,0 +1,25 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace HopFrame.Database.Models.Entries;
+
+public class TokenEntry {
+    public const int RefreshTokenType = 0;
+    public const int AccessTokenType = 1;
+
+    /// <summary>
+    /// Defines the Type of the stored Token
+    /// 0: Refresh token
+    /// 1: Access token
+    /// </summary>
+    [Required, MinLength(1), MaxLength(1)]
+    public int Type { get; set; }
+
+    [Key, Required, MinLength(36), MaxLength(36)]
+    public string Token { get; set; }
+
+    [Required, MinLength(36), MaxLength(36)]
+    public string UserId { get; set; }
+
+    [Required]
+    public DateTime CreatedAt { get; set; }
+}