:drunk: No idea what did AI did

DysonNetwork.Common/Models/AccountConnection.cs

@@ -0,0 +1,81 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using NodaTime;
+
+namespace DysonNetwork.Common.Models;
+
+/// <summary>
+/// Represents a connection between an account and an authentication provider
+/// </summary>
+public class AccountConnection
+{
+    /// <summary>
+    /// Unique identifier for the connection
+    /// </summary>
+    [Key]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public string Id { get; set; } = null!;
+
+    /// <summary>
+    /// The account ID this connection is associated with
+    /// </summary>
+    public string? AccountId { get; set; }
+
+    /// <summary>
+    /// The authentication provider (e.g., "google", "github")
+    /// </summary>
+    [Required]
+    [MaxLength(50)]
+    public string Provider { get; set; } = null!;
+
+    /// <summary>
+    /// The unique identifier for the user from the provider
+    /// </summary>
+    [Required]
+    [MaxLength(256)]
+    public string ProvidedIdentifier { get; set; } = null!;
+
+    /// <summary>
+    /// Display name for the connection
+    /// </summary>
+    [MaxLength(100)]
+    public string? DisplayName { get; set; }
+
+    /// <summary>
+    /// OAuth access token from the provider
+    /// </summary>
+    public string? AccessToken { get; set; }
+
+    /// <summary>
+    /// OAuth refresh token from the provider (if available)
+    /// </summary>
+    public string? RefreshToken { get; set; }
+
+    /// <summary>
+    /// When the access token expires (if available)
+    /// </summary>
+    public Instant? ExpiresAt { get; set; }
+
+    /// <summary>
+    /// When the connection was first established
+    /// </summary>
+    public Instant CreatedAt { get; set; }
+
+    /// <summary>
+    /// When the connection was last used
+    /// </summary>
+    public Instant? LastUsedAt { get; set; }
+
+    /// <summary>
+    /// Additional metadata about the connection
+    /// </summary>
+    [Column(TypeName = "jsonb")]
+    public Dictionary<string, object>? Meta { get; set; }
+
+    /// <summary>
+    /// Navigation property for the associated account
+    /// </summary>
+    [ForeignKey(nameof(AccountId))]
+    public virtual Account? Account { get; set; }
+}